Solid State of Physics/Semiconductor Physics

ELTN 3113 – Digital Electronics
ELTN 2232 – Analogue Electronics

• Growth and characterisation of semiconductor thin films for photovoltaic, photocatalytic water splitting, sensor and battery applications
• Study of structural properties and electronic band states near the Fermi level in semiconductors using X-ray absorption spectroscopy (EXAFS and XANES)

Fellow Member, Institute of Physics, Sri Lanka

1. Most Outstanding Senior Researcher in the fields of Natural Sciences, CVCD Excellence Awards 2022
2. SUSRED, NSF award, 2019
3. Presidential Awards for Research 2000, 2003, 2004, 2006, 2008, 2016
4. NRC Merit Awards for Scientific Publications in 2010, 2014
5. Monbukagakusho, Japanese Government Research Scholarship 2004-2008 (Kyushu University)
6. Commonwealth Scholarship, New Zealand 2004 (University of Canterbury)

Patents

International

1. TN Gurusinghe, LDPS Jayasekara, HE Wijesooriya, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022) System and method for addressable data communication using Radio Frequency Communication, (WO 2022/189847 A1). World Intellectual Property Organisation https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2022189847&_cid=P20-L8E3Q1-87682-1

National

1. Jayasekara, L.D.P.S., Wijesooriya, H.E., Gurusinghe, T.N., Rajapaksha, R.M.I.U., Gunawardhana, M.P.A.V., Piyumal, P.L.A.K., Seneviratne J.A., Ranaweera, A.L.A.K., Jayathilaka, K.M.D.C., Wijesundera, L.B.D.R.P., Kalingamudali, S. R. D., (2024). Addressable, Reliable and Bi-directional Data Communication System for Internet of Things (IoT) and Industrial Internet of Things (IIoT) Applications based on Controller Area Network (CAN) Protocol to Monitor, Control and Visualize real-time Data on a Local or Remote Dash – Board, Sri Lankan Patent Application No 22424. National Intellectual Property Office, Sri Lanka
2. Rajapaksha, R.M.I.U., Gurusighe, T. N., Jayasekare, L. D. P. S., Wijesooriya, H. E., Piyumal, P. L. A. K., Seneviratna, J. A., Ranaweera, A. L. A. K., Jayathilaka, K. M. D. C., Wijesundera, L. B. D. R. P., Kalingamudali, S. R. D. (2024). Artificial Intelligence-based Liquid Petroleum Gas Level Indicator, Sri Lankan Patent Application No. 22121. National Intellectual Property Office, Sri Lanka
3. TN Gurusinghe, LDPS Jayasekara, HE Wijesooriya, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera, SRD Kalingamudali, (2022) Method for addressable data communication, processing, control, and visualisation based on RF wireless communication with or without an Internet connection. [Sri Lankan Patent Granted, File No. 21656]
4. RMIU Rajapaksha, PLAK Piyumal, HE Wijesooriya, TN Gurusinghe, LDPS Jayasekara, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera, SRD Kalingamudali, AI Based Smart LP Gas Level Indicator. [Sri Lankan Patent Granted, File No. 22121]
5. HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, RMIU Rajapaksha, MPAVGunawardhana, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Automated Stand-alone Wireless Water Quality Monitoring and Rainwater Harvesting System, Sri Lankan Patent No 22622(Pending)
6. LDPS Jayasekara, TN Gurusinghe, HE Wijesooriya, MPAV Gunawardhana, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Smart Battery-Less Identification Card with Location Tracking and Attendance Monitoring Capabilities, Sri Lankan Patent No 22621 (Pending)
7. RMIU Rajapaksha, MPAV Gunawardhana, PLAK Piyumal, LDPS Jayasekara, TN Gurusinghe, HE Wijesooriya, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Neutral Connection-free Liquid-petroleum-gas/propaneSensitive Safety Electrical Switch, Sri Lankan Patent No 22450 (Pending)

Industrial Designs

1. RMIU Rajapaksha, PLAK Piyumal, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, ALAL Ranaweera, JA Seneviratne, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, Smart Liquid Petroleum Gas Level Indicator. [Sri Lankan Industrial Design Granted, File No. 13554]
2. RMIU Rajapaksha, PLAK Piyumal, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, ALAL Ranaweera, JA Seneviratne, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, Emergency shut-off LP Gas regulator for Domestic Use. [Sri Lankan Industrial Design Granted, File No. 13613]

Publications

Book Chapters

1. RP Wijesundera, Electrodeposited Cu₂O Thin Films for Fabrication of CuO/Cu₂O Heterojunction (Invited chapter), Solar Cells / Thin Film Technologies, InTech Open Access Publisher, ISBN 978-953-307-570-9 (2011)

Peer Reviewed Indexed Journal Publications

1. WTRS Fernando, THNG Amaraweera, KMDC Jayathilaka, LSR Kumara, O Seo, K Osaka, O Sakata, RP Wijesundera, HWMAC Wijayasinghe, Engineering electron density and structural properties of CuO anode material via calcination and in situ synchrotron XRD for enhanced lithium-ion battery performance, Journal of Materials Science, 60 (2025) 25386-25408
2. WTRS Fernando, THNG Amaraweera, KMDC Jayathilaka, LSR Kumara, O Seo, K Osaka, O Sakata, RP Wijesundera, HWMAC Wijayasinghe, Facile synthesis of sponge-like microstructured CuO anode material for rechargeable lithium-ion batteries, Coatings, 15(4), (2025) 467
3. HE Wijesooriya, JA Seneviratne, KMDC Jayathilaka, WTRS Fernando, PLAK Piyumal, ALAK Ranaweera, SRD Kalingamudali, LSR Kumara, O Seo, O Sakata, RP Wijesundera, Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu₂O Thin-Film Semiconductors, Physchem, 5(1), (2025) 6 (1-16)
4. MDPA Shakya, KMDC Jayathilaka, WTRS Fernando, WTMAPK Wanninayake, LSR Kumara, O Seo, J Tang, O Sakata, WP Siripala, RP Wijesundera, A Study on Cu Thin-Film Electroplated TiO₂ Photoanodes for Applications in Natural Dye-Sensitized Solar Cells, 15(1), (2024) 28 (1-12)
5. SAAB Thejasiri, KMDC Jayathilaka, FSB Kafi, LSR Kumara, O Seo, S Yasuno, O Sakata, W Siripala, RP Wijesundera, Cu₂O Homojunction Solar Cells: Efficiency Enhancement with a High Short Circuit Current, Coatings, 14(8), (2024) 932 (1-12)
6. GWC Kumarage, RP Wijesundera, E Comini and BS Dassanayake, Enhancing the Photovoltaic Performance of Cd_(1−x)Zn_xS Thin Films Using Seed Assistance and EDTA Treatment, Micro, 3 (2023) 867–87
7. W T M A P K Wanninayake, D G K K Namawardana, R M G Wanigasekara, K M D C Jayathilaka, R P Wijesundera, W Siripala, M I Malik, Efficiency Boost of Inverted Polymer Solar Cells Using Electrodeposited n-type Cu₂O Electrons Selective Transport Layers (ESTLs), Journal of the National Science Foundation of Sri Lanka, J. Natn. Sci. Foundation Sri Lanka, 51 (2): (2023) 253- 261
8. Muhammad Azhar Ansari, Anum Hafeez, Mehwish Mustafa, Ruwan Palitha Wijesundera, Muhammad Imran Malik, Molecular tailoring of donor and acceptor materials of organic solar cells for improvement of their optoelectronic properties, Materials Science in Semiconductor Processing, 150, 106919 (2022)
9. WTRS Fernando, KMDC Jayathilaka, RP Wijesundera and W Siripala, A Comparative Study: Sequentially and Single Step Electrodeposited CZTS Thin Films, Phys. Status Solidi A, 202200231 (2022)
10. SAAB Thejasiri, FSB Kafi, RP Wijesundera, W Siripala, Fabrication of cuprous oxide homojunction solar cell by varying the lactic acid ion concentration of thin film p-Cu₂O deposition bath, ESC Transactions, 107 (1), 19543-19550 (2022)
11. LDPS Jayasekara, TN Gurusinghe, HE Wijesooriya, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera, SRD Kalngamudali, Smart system using lora technology to connect rural arears underserved by exsting internet and telecommunication technologies, ESC Transactions, 107 (1), 17731-17744 (2022)
12. DGK Kalara Namawardana, RM Geethanjana Wanigasekara, WTM Aruna PK Wanninayake, KMD Charith Jayathilaka, Ruwan P Wijesundera, Withana Siripala, Muhammad Imran Malik, Fabrication of inverted organic solar cells on stainless steel substrate with electrodeposited and spin coated ZnO buffer layers, Journal of Polymer Engineering, 42 (3), 233-242 (2022)
13. RKKGRG Kumarasinghe, PKK Kumarasinghe, RP Wijesundera, BS Dassanayake, Thermally evaporated CdS/CdTe thin film solar cells: Optimization of CdCl2 evaporation treatment on absorber layer, Current Applied Physics, 33, 33-40 (2022)
14. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath, N Gunawardhana, N Kaur, E Comini, N Gunawardhana and BS Dassanayake, Growth and Characterization of Seed‑Assisted, EDTA‑Treated, Chemical Bath‑Deposited CdS, Journal of Electronic Materials, 50 (6), 4858–4865 (2021)
15. FSB Kafi, KMDC Jayathilaka, RP Wijesundera, W Siripala, Effect of pre-surface treatments on p-Cu₂O/Au Schottky junctions, Journal of the National Science Foundation of Sri Lanka, 49 (1), (2021)
16. Haleemathul Zahadiya, Ruwan P Wijesundera, Champika V Hettiarachchi, Ishanie R Perera, Effect of Benzene Derivatives as Guest Molecules on Semiconductor Properties of MOF‐199, ChemistrySelect, 6(3), 425-429 (2021)
17. FSB Kafi, RP Wijesundera, W Siripala, Enhanced Photoelectrochemical Water Splitting by Surface Modified Electrodeposited n‐Cu₂O Thin Films, Phys. Status Solidi A, 2000330, (2020)
18. RKKGRG Kumarasinghea, WGC Kumaragec, RP Wijesundera, N Kaure, E Cominie, and BS Dassanayake, A Comparative Study on CdS Film Formation under Variable and Steady Bath-Temperature Conditions, Semiconductors, 54 (8), 838–843 (2020)
19. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath, N Kaur, E Comini, N Gunawardhana and BS Dassanayake, A study on CdCl₂ activation of CBD-CdS films, Journal of Materials Science: Materials in Electronics, 1-7 (2020)
20. Suleshi Niwarthana Abeysingha, Ruwan Palitha Wijesundera, Champika Vithana Hettiarachchi, Ishanie Rangeeka Perera, Zn based 3D-Coordination polymer as the photoanode material in dye-sensitized solar cells, Materials Chemistry and Physics, 251, 123109 (2020)
21. FSB Kafi, KMDC Jayathileka, RP Wijesundera, W Siripala, Improvement of photovoltaic properties of n-Cu₂O/Au Schottky junctions, Materials Research Express, 6 (8), 085520 (2019)
22. WGC Kumarage, RP Wijesundera, N Kaur, D Zappa, VA Seneviratne, CP Jayalath, and B.S. Dassanayake, A Comparative Assessment: Chemical Bath Deposited and Electrodeposited CdS Films, Int. J. Electroactive Mater., 7, 1-6 (2019)
23. FSB Kafi, KMDC Jayathileka, RP Wijesundera, and W Siripala, Dependence of interfacial properties of p-Cu₂O/electrolyte and p-Cu₂O/Au junctions on the electrodeposition bath pH of p-Cu₂O films, Mater. Res. Express 5, 086406 (2018)
24. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath, T Varga, BS Dassanayake, Optical, structural and photo electrochemical properties of Cd_{1− x}Zn_xS films grown by chemical bath deposition, Applied Physics A 124 (7), 494 (2018)
25. FSB Kafi, KMDC Jayathileka, RP Wijesundera, and W Siripala, Effect of Bath pH on Interfacial Properties of Electrodeposited n‐Cu₂O Films, Physica Status Solidi (b), Phys. Status Solidi B, 255, 1700541 (2018)
26. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, MgCl₂ activation of CdS films: An alternative for CdCl₂, Journal of Photochemistry and Photobiology A: Chemistry, 367, 171-177 (2018)
27. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, Growth and characterization of EDTA assisted CBD-CdS, Materials Chemistry and Physics, 200, 1-8 (2017)
28. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, A study on the enhancement of optoelectronic properties of CdS thin films: seed-assisted fabrication, Semi. Sci. Technol., 32, 045014, pp. 1-11 (2017)
29. RP Wijesundera, LKADDS Gunawardhana and W Siripala, Electrodeposited Cu₂O homojunction solar cells: Fabrication of a cell of high short circuit photocurrent, Solar Energy Materials and Solar Cells, 157, pp. 881–886 (2016)
30. FSB Kafi, KMDC Jayathileka, RP Wijesundera, and W Siripala, Fermi-level pinning and effect of deposition bath pH on the flat-band potential of electrodeposited n-Cu₂O in an aqueous electrolyte, Physica Status Solidi (b), 253 (10), 1965-1969 (2016)
31. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, Influence of Bath Temperature on CBD-CdS Thin Films, Procedia Engineering, 139, pp. 64 – 68 (2016)
32. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, Tunable optoelectronic properties of CBD-CdS thin films via bath temperature alterations, Phys. D: Appl. Phys., 49 (9), 095109 (2016)
33. KDRN Kalubowila, LKADDS Gunawardhana, RP Wijesundera, W Siripala, 2014, Methods for improving n-type photoconductivity of electrodeposited Cu₂O thin films, Semi. Sci. Technol., 29(7), 075012, pp. 1-7 (2014)
34. M Hidaka, K Takeuchi, RP Wijesundera, LSR Kumara, S Sugihara, N Momoshima,
    S Kubuki, Nark Eon,Structural and electronic properties of iron oxides in the celadon glazes (II), Cerâmica 58, pp. 534-541(2012)
35. M Hidaka, K Takeuchi, RP Wijesundera, LSR Kumara, M Watanabe, Jae-Young Choi, Nark Eon Sung, Correlation between the green-like coloration and the structural and electronic properties of celadon glazes (I), Cerâmica 58, pp. 328-337(2012)
36. M Hidaka1, K Ohashi, RP Wijesundera, LSR Kumara, S Sugihara, N Momoshima, S Kubuki and NE Sung, Local structures and electronic band states of α−Fe₂O₃ polycrystalline particles in the glazes of the HIZEN celadons produced in the Edo period of Japan, by means of X-ray absorption spectra (II), Cerāmica 57, pp. 155-165 (2011)
37. Hidaka1, K. Ohashi, R. P. Wijesundera, L. S. R. Kumara, M. Watanabe, K. Koga, Jae-Young Choi5, N. E. Sung and Y. J. Park, Correlation between glaze-colors and structural properties of the HIZEN celadons produced in the Edo period of Japan, by means of X-ray diffraction (І), Cerâmica 57, pp.106-114 (2011)
38. RP Wijesundera, Fabrication of CuO/Cu₂O heterojunction using electrodeposition technique for solar cell applications, Semi. Sci. Technol., 25(4), 045015, pp. 1-5 (2010)
39. RP Wijesundera, M Hidaka, K Koga, JY Choi and NE Sung, Structural and electronic properties of electrodeposited heterojunction of CuO/Cu₂O, Ceramics-Silikaty 54(1), (2010)
40. M Hidaka, H Horiuchi, K Ohashi, RP Wijesundera, LSR Kumara, NE Sung, Local structures and electronic band states of á-Fe₂O₃ polycrystalline particles included in the red-color overglazes and the transparent glazes of the Kakiemon-style porcelains by means of X-ray absorption spectra (II), Ceramica 55 (335), 223-232 (2009)
41. M Hidaka, H Horiuchi, K Ohashi, RP Wijesundera, LSR Kumara, JY Choi, YJ Park, Structural properties of the red-color overglazes on the Kakiemon-style porcelains produced in the later 17th century by means of X-ray diffraction (I), Ceramica 55 (334), pp. 120-127 (2009)
42. M Hidaka, RP Wijesundera, R Kumara, Y Naguchi, M Miyayama, SH Choi, NE Sung and MG Kim, Correlation Between Local Structures and Partial Electronic Band States in Ferroelectric Bi₄-xLa_xTi₃O₁₂; 0.0 < x < 1.46, Ceramics-Silikaty 53 (2), pp. 118-127 (2009)
43. M Hidaka, K Ohashi, S Kajihara, RP Wijesundera, LSR Kumara, Jae-Young Choi and Nark Eon Sung, Structural properties of the red-color overglaze for the HIZEN porcelains produced in the early Edo period of Japan, Ceramics International, 35 (2), pp. 875-886 (2009)
44. S Kajihara, M Hidaka, RP Wijesundera, LSR Kumara, M Koga, S Kobayashi, T Tsuru, K Koga, K Shimomura, Jae-Young Choi, Nark Eon Sung, Young Jun Park, Correlation between the Izumiyama porcelain ceramics and the red-overglaze enamels of the Kakiemon-style porcelains, Ceramics International, 34 (7), pp. 1681-1689 (2008)
45. RP Wijesundera, M Hidaka, K Koga, M Sakai, W Siripala, Jae-Young Choi, Nark Eon Sung, Effects of annealing on the properties and structure of electrodeposited semiconducting Cu-O thin films, Physica Status of Solidi (b), 244 (12), pp. 4629-4642 (2007)
46. M Hidaka, N Tokiwa, RP Wijesundera, J Awaka, S Nagata, Young Jun Park, Ki Bong Lee, Order-disorder transistion of t2g-orbitals of V3+ ions and incommensurate structural deformations in the metallic spinel CuV₂S₄, Physica Status of Solidi (b), 244 (7), 2565-2575 (2007)
47. RP Wijesundera, M Hidaka, W Siripala, Sun-Hee Choi, Nark Eon Sung, Min Gyu Kim, and Jay Min Lee, Electronic states and local structures of Cu ions in electrodeposited thin films of Cu and Cu₂O from X-ray absorption spectra, Physica Status of Solidi (b), 243 (8), 1791–1801 (2006)
48. M Hidaka, M Soejima, RP Wijesundera, M Soda, M. Sato, Sun-Hee Choi, Nark Eon Sung, Min Gyu Kim, and Jay Min Lee, Metal–insulator transition induced by electronic and structural modulations in oxygen-deficient perovskite-type TbBaCo₂O₅, Physica Status of Solidi (b), 243 (8), pp. 1813–1822 (2006)
49. RP Wijesundera, M Hidaka, K Koga, M Sakai, W Siripala, Growth and characterisation of potentiostatically electrodeposited Cu₂O and Cu thin films, Thin Solid Films, 500, 241-246 (2006)
50. RP Wijesundera, W Siripala, Preparation of CuInS₂ Thin Films by Electrodeposition and sulphurisation for Applications in Solar Cells, Solar Energy Materials and Solar Cells 81, 147-154 (2004)
51. R Garuthara, RP Wijesundera, and W Siripala, Characterisation of CuInS₂ thin film prepared by electrodeposition and sulphurisation with photoluminescence spectroscopy, Solar Energy Materials and Solar Cells 79, pp 331-338 (2003)
52. RP Wijesundera, LDRD Perera, KD Jayasuriya, W Siripala, KTL De Silva, AP Samanthilleke and IM Dharmadasa, Sulphidation of electrodeposited Cuprous Oxide thin films for Photovoltaic Applications, Solar Energy Materials and Solar Cells 61, pp 277-286 (2000)

Peer Reviewed Non-Indexed Journal Publications

1. UI Danasuriya, BC Liyanapathirana, CKMD Jayathilaka, RP Wijesundera, WGC Kumarage, Recent Advancements in Chemical Bath Deposited Pristine CDs Thin Films For Hotovoltaic Applications, Journal of Desk Research Review and Analysis, 2(2) (2024) 95-114
2. RM Geethanjana Wanigasekara, DGKK Namawardana, WTMAPK Wanninayake, KMDC Jayathilaka, RP Wijesundera, W Siripala, Fabrication of P3HT/PCBM Inverted Solar Cells with ZnO electron transport layer, Sri Lankan Journal of Physics, 22(1), pp.40–49 (2021)
3. W.C. Kumarage, R.P. Wijesundera, One-Dimensional Metal Oxide Nanostructures: H₂ Gas Sensors, The Journal of Desk Research Review and Analysis, Vol. 1, Issue 1, 2023, 114-127

Papers of Conference Proceedings

1. BMUH Balasuriya, FSB Kafi, KMDC Jayathilaka, RP Wijesundera, GROWTH OF p-CU2O THIN FILM ON n-SnO₂ ELECTRODE FOR SOLAR CELL APPLICATIONS, Proceedings of the 13^th YSF Symposium (2025) 1-7
2. S.B. Kafi, B.H. Gunaratna, K.M.D.C. Jayathilaka and R.P. Wijesundera, Electrodeposited thin film SnO₂ photoelectrode for PEC applications, Proceedings of the Technical Sessions, Institute of Physics, Sri Lanka, 40 (2024) 47-53
3. D. P. A. Shakya, K. M. D. C. Jayathilaka, W. T. M. P. K. Wanninayake, Rosantha Kumara, W. P. Siripala and R. P. Wijesundera, Enhancement of Photocurrent of TiO₂ Film as a Modified Photoanode of Dye Sensitized Solar Cell by Electrodeposited Copper in the TiO₂ Particle Space, Proceedings of the Technical Sessions, Institute of Physics, Sri Lanka, 40 (2024) 63-70
4. S. B. Kafi, B. H. Gunaratne, K. M. D. C. Jayathilaka and R. P. Wijesundera, Optimization of growth parameters of electrodeposited tin oxide thin films for PV applications, University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2023), 191-197 (2023)
5. FSB Kafi, SAAB Thejasiri, RP Wijesundera and W Siripala, Thin film cuprous oxide homojunction photoelectrode for water splitting, University of Kelaniya International Proceedings of Multidisciplinary Research and Applications (Special Issue – ICAPS 2021), 1, 29-35 (2021)
6. DGKK Namawardana, RM Geethanjana Wanigasekara, WTMAPK Wanninayake, KMDC Jayathilaka, RP Wijesundera, W Siripala, Fabrication of P3HT:PCBM Inverted Organic Solar Cells, 37th Tech. Sess. Inst. Phys., Sri Lanka, 54-61 (2021)
7. WTRS Fernando, KMDC Jayathilaka, RP Wijesundera and W Siripala, Growth of ZnO thin films on Mo substrate for PV applications, Proc. 37th Tech. Sess. Inst. Phys., Sri Lanka, 62-69 (2021)
8. WTRS Fernando, KMDC Jayathilaka, RP Wijesundera and W Siripala, Growth of CZTS thin films by a single step electrodepostion technique for PV, Proc. 35th Tech. Sess. Inst. Phys., Sri Lanka, 47-55 (2019)
9. WTRS Fernando, KMDC Jayathilekea, RP Wijesundera and W Siripala, Growth of Cu₂ZnSnS₄ for solar cell applications, Solar Asia 2018, Proc. Inte. Conf. (Solar Asia 2018), Kandy, Sri Lanka, pp. 46-50 (2018)
10. WTRS Fernando, KMDC Jayathilaka, RP Wijesundera and W Siripala, Growth of p-type CZTS nano rod thin films for PV applications, GloriaScientiam – Golden Jubilee Commemorative Volume, Faculty of Science, University of Kelaniya, Chapter 40: pp 471 – 480 (2017)
11. WTRS Fernando, KMDC Jayathilekea, RP Wijesundera and W Siripala, Growth of CuZnS thin films for PV applications, Proc. 33^rd Sess. Inst. Phys., Sri Lanka, pp. 12-18 (2017)
12. KAM Jeewanthi, RP Wijesundara and HH Sumathipala, Study of dielectric properties of indigenous oils as a possible alternative liquid for mineral oils, Proc. 33^rd Sess. Inst. Phys., Sri Lanka, pp. 19-23 (2017)
13. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, Growth, Optical, Structural, Morphological and Photoelectrochemical Properties of Cd_1−xZn_xS Films, International Conference on Sustainable Built Environment (ICSBE) 2016, pp. 59-64, (2017)
14. KDRN Kalubowila, RP Wijesundera and W Siripala, Electrodeposited CuO/Cu₂O heterojunction for PV applications, Proc. 31st Tech. Sess. Inst. Phys., Sri Lanka, pp. 69-75 (2015)
15. KS Janaka Kumara, RP Wijesundera and KD Jayasuriya, 2015, Plantain Pith Battery Powered Lighting System, Proc. 31st Tech. Sess. Inst. Phys., Sri Lanka, pp. 29-37 (2015)
16. KDRN Kalubowila, RP Wijesundera and W Siripala, Electrodeposited (Cu₂O)_1-x(CuO)_x/Cu₂O heterojunction solar cell, Proc. 30th Tech. Sess. Inst. Phys., Sri Lanka, pp. 10-18 (2014)
17. LKADDS Gunawardhana, RP Wijesundera and W Siripala, Fabrication of an efficient Cu₂O homojunction by electrodeposition technique for solar cell applications, Proc. 30th Tech. Sess. Inst. Phys., Sri Lanka, pp. 1-9 (2014)
18. MDGM Abeyratne, IU Kalupahana, WAP Buddhika, SD Kumara, NWK Jayatissa, LBDRP Wijesundera, JC. Harambearachchi, and SRD Kalingamudali,An Inexpensive Universal Serial Bus Interfaced Home Automation System, Proc. IET Nineteenth Annual Technical Conference, Sri Lanka (2012)
19. S Barua, M Abdulla-Al-Galib, KMA Salam, MA Awal and RP Wijesundera, Improved efficiency of photovoltaic cell based on indium-phosphide-oxide, indium-phosphide, indium-gallium arsenide and indium-gallium-antimonide, IEEE Xplore Release, 2nd International Conference on the Developments in Renewable Energy Technology (ICDRET), Dhaka, pp 1-4 (2012)
20. KM Kumarasiri, RP Wijesundera and UK Abeywarna, Investigation of the Peltier Cooling Effect Using Low Cost n-Cu₂O and p-Cu₂S Semiconductors, Proc. 28^th Sess. Inst. Phys., Sri Lanka, pp. 71-76 (2012)
21. N Jayashantha, KD Jayasuriya and RP Wijesundera, Biodegradable Plantain Pith for Galvanic Cells, 28^th Tech. Sess. Inst. Phys., Sri Lanka, pp. 92-99 (2012)
22. Mir Abdulla-Al-Galib, Soumen Barua, KMA Salam, RP Wijesundera, Effects of Indium-Phosphide-Oxide on Photon Absorption of Multijunction Photovoltaic Cells, International Proceedings of Computer Science and Information Technology, 21, pp. 211-215 (2011)
23. Mir Abdulla-Al-Galib, Soumen Barua, KMA Salam, Mohammad A Awal, RP Wijesundera, 2011, High Efficient Multi-junction Photovoltaic Cell based on Indium-Phosphide-Oxide, Indium-Gallium-Arsenide and Indium-Gallium-Antimony, International Conference on Advances in Electrical Engineering (ICAEE-2011), Dhaka, Bangladesh, pp 1-5 (19-21 December 2011)
24. RP Wijesundera and M Hidaka, Fabrication of CuO/Cu₂O Heterojunction and Its Local Structural Characterization, Inte. Conf. (Solar Asia 2011), Kandy, Sri Lanka, pp. 105-111, (2011)
25. RP Wijesundera, NKAC Kodiweera, W Siripala, and R Garuthara, Electronic Band Gap States in Electrodeposited Cuprous Oxide Semiconductors, 20^th Tech. Sess. Inst. Phys., Sri Lanka, pp. 75-80 (2004)
26. RP Wijesundera, PK Kapila Susantha, JRP Jayakody, W Siripala, Ti/Cu₂O Photoelectrodes in a Photoelectrolytic Solar Cell, 19^th Tech. Sess. Inst. Phys., Sri Lanka, pp. 59-64 (2003)
27. WGD Dharmaratna, PWC Roshan, W Siripala and RP Wijesundera, A correlation between activation energy and light absorption of WO₃ incorporated TiO₂, Proc. Annual Research Symp. 2002, University of Ruhuna (2002)
28. RP Wijesundara, NP Gunatunga, W Siripala, KD Jayasuriya, SRD Kalingamudali, KTL De Silva and JKDS Jayanetti, Fabrication and Characterisation of CuInS₂/ZnSe/Metal Structures for Solar Cell Applications, Proc. 16^th Sess. Inst. Phys., Sri Lanka, pp. 63-70 (2000)
29. RP Wijesundara, MP Nadesalingam, W Siripala, KD Jayasuriya, SRD Kalingamudali, JKDS Jayanetti and KTL De Silva, A study of CuInS₂ thin films for photovoltaic applications, Proc. 15^th Sess. Inst. Phys., Sri Lanka, pp. 52-58 (1999)
30. RP Wijesundara, W Siripala, KD Jayasuriya, SRD Kalingamudali, KTL De Silva, JKDS Jayanetti, AP Samantilleke and IM Dharmadasa, Growth and characterisation of CuInS₂ thin films, Proc. Wkshp. Low Cost Elect. Mat. and Solar Cells, Peradeniya, Sri Lanka, pp. 40-45 (1999)
31. RP Wijesundara, SRD Kalingamudali and KD Jayasuriya, Construction of a near idealnanoammeter, Proc. 14^th Sess. Inst. Phys., Sri Lanka, pp. 50-53 (1998)
32. W Siripala, RP Wijesundera, LDRD Perera, KD Jayasuriya and KTL De Silva, Study of sulphidation of electrodeposited Cu₂O thin films for solar cell applications, Wkshp. on Renewable Energy Sources, Colombo, pp 89-94 (1998)

Abstracts of Conference Proceedings

1. RMBMS Rajaguru, FSB Kafi, KMDC Jayathilaka and LBDRP Wijesundera, Effect of annealing temperature on the surface morphology of electrodeposited tin-oxide thin films for solar cell application, International Conference on Applied and Pure Sciences, Faculty of Science, University of Kelaniya, Sri Lanka (2025) 128
2. SV Millamadiththa, KMDC Jayathilaka and LBDRP Wijesundera, Preparation of electrodeposited n-Cu₂O for rechargeable battery applications, International Conference on Applied and Pure Sciences, Faculty of Science, University of Kelaniya, Sri Lanka (2025) 118
3. WDACH Costha, KMDC Jayathilaka, LSR Kumara, W Siripala and LBDRP Wijesundera, Electrodeposition of copper films of flower-like morphology using a hydrogen peroxide bath, International Conference on Applied and Pure Sciences, Faculty of Science, University of Kelaniya, Sri Lanka (2025) 116
4. CW Warnakulasooriya and LBDRP Wijesundera, Growth of ZnO thin films on FTO substrate for PV applications, International Conference on Applied and Pure Sciences, Faculty of Science, University of Kelaniya, Sri Lanka (2025) 113
5. WTRS Fernando, THNG Amaraweera, RP Wijesundera, HWMAC Wijayasinghe, Comparison of the electrochemical performance of p-Cu₂O and n-Cu₂O anode materials synthesised by electrodeposition technique for rechargeable lithium-ion batteries, Proceedings of the Postgraduate Institute of Science Research Congress (RESCON) – 2024, University of Peradeniya, 186
6. D.P.A. Shakya, K.M.D.C. Jayathilaka, W. T. M. P. K. Wanninayake, R. Kumara, W.P. Siripala and L.B.D.R.P. Wijesundera, Co-sensitization performance of dye sensitized solar cell based on combination of natural dyes extracted from grapes and green tea, University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2024), 199 (2024)
7. Hetti Arachchige K. A., Wijesundera L. B. D. R. P., Kumarage W. G. C., Jayathilaka K. M. D. C. and Siripala W. P., Sulphur treated single step electrodeposited Cu₂ZnSnS_4, University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2024), 128 (2024)
8. Kapukotuwa K. M. V. Y., Shakya M. D. P. A., Jayathilaka K. M. D. C., Bandara T. M. W. J. and Wijesundera L. B. D. R. P., Effect of temperature and pH on the wettability of electrodeposited n-type cuprous oxide films, University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2024), 120 (2024)
9. Millamadiththa S. V., Jayathilaka K. M. D. C. and Wijesundara L. B. D. R. P., Electrodeposited p-type copper oxide for lithium-ion battery applications, University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2024), 111 (2024)
10. Wijesinghe W. A. N. D., Jayathilaka K. M. D. C., Ranaweera A. L.A. K., Wijesundara L. B. D. R. P. and Kalingamudali S. R. D., Fabrication and characterization of sulfur-treated cuprous oxide-based supercapacitors, University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2024), 110 (2024)
11. Danansuriya D. B. U. I., Hetti Arachchige K. A., Manilgama T. T. D., Kalingamudali S. R. D., Premaratne W. A. P. J., Jayathilaka K. M. D. C., Wijesundara L. B. D. R. P. and Kumarage W. G. C. The role of ascorbic acid in optimizing optoelectronic performances of CdS thin films, University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2024), 109 (2024)
12. M.U.H. Balasuriya, F.S.B. Kafi, K.M.D.C. Jayathilaka and L.B.D.R.P. Wijesundera, Development of tin oxide/copper (I) oxide heterojunction solar celL, Proceedings of the International conference on Applied and Pure Sciences 2024 (ICAPS -2024), 100 (2024)
13. T.R.S Fernando, T.H.N.G Amaraweera, R P Wijesundera, H.W.M.A.C Wijayasinghe, Comparison of the electrochemical performance of p-Cu₂O and n-Cu₂O anode materials synthesized by electrodeposition technique for rechargeable lithium-ion batteries, Proceedings of the Postgraduate Institute of Science Research Congress Sri Lanka, 11, (2024) 186
14. W T R S Fernando, T H N G Amaraweera, R P Wijesundera, H W M A C Wijayasinghe, Electrochemical performance of CuO anode materialsynthesized by chemical precipitation technique atdifferent temperatures, for rechargeable lithium-ionbatteries, Second International Conference on Frontiers in Chemical Technology, Institute of Chemistry Ceylon, 33, 2024
15. T.R.S Fernando, T.H.N.G Amaraweera, R P Wijesundera, H.W.M.A.C Wijayasinghe, Electrochemical performance of n-type Cu₂O anode material synthesized by electrodeposition method for rechargeable lithium-ion batteries, International Postgraduate Research Conference (IPRC) – 2023, Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, 45, 2023
16. T.R.S Fernando, K.M.D.C Jayathilekea, RP Wijesundera, W Siripala, Growth of CZTS thin films by sequential andsingle step electrodeposition techniques, 2nd National Research SymposiumNational Research Council of Sri Lanka 2023, National Research Council 120/7, Vidya Mawatha, Colombo 07, 46, 2023
17. T. R. S. Fernando, T. H. N. G. Amaraweera, R. P. Wijesundera, H.W.M.A.C. Wijayasinghe, Electrochemical performance of Cu2O anode material synthesized by electrodeposition method for rechargeable lithium-ion batteries, International Conference on Nanotechnology Research and Innovation, UA Editora, Universidade de Aveiro, 106, 2023
18. T. R. S. Fernando, T. H. N. G. Amaraweera, R. P. Wijesundera and H. W. M. A.C. Wijayasinghe, Electrochemical performance of Cu₂O anode material synthesized by electrodeposition method for rechargeable lithium-ion batteries, International Conference on Nanotechnology Research and Innovation, University of Aveiro, Aveiro, Portugal, November 20-24, 2023, O15, 106 (2023)
19. T. R. S. Fernando, T. H. N. G. Amaraweera, R. P. Wijesundera and H. W. M. A.C. Wijayasinghe, Electrochemical performance of n-type Cu₂O anode materialsynthesized by electrodeposition method for rechargeable lithium-ion batteries, Proceedings of the 23rd Conference,International Postgraduate Research Conference (IPRC) – 2023, Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, STMM 36, 45 (2023)
20. WTRS Fernando, KMDC Jayathilaka, RP Wijesundera, W Siripala, Growth of CZTS thin films by sequential and single step electrodeposition techniques, Second Annual Research Symposium of the NRC, 46 (2023)
21. FSB Kafi, KMDC Jayathileka, RP Wijesundera, W. Siripala, Development of Cu2O homojunction solar cell by deduction of interfacial discontinuities, Second Annual Research Symposium of the NRC, 47 (2023)
22. KLAC Lakshan, HH Sumathipala and LBDRP Wijesundara, Ionic conductivity of novel solid polymer electrolyte based on polyethylene oxide (PEO) and magnesium pyrophosphate (Mg₂P₂O₇), University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2023), 182 (2023)
23. BRL Anjalika, KMDC Jayathilaka, ALAK Ranaweera, LBDRP Wijesundera and SRD Kalingamudali, Fabrication and characterization of electrodeposited nano structured copper oxide-based supercapacitors, University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2023), 77 (2023)
24. MDPA Shakya, KMDC Jayathilaka, WTMPK Wanninayake, R Kumara, WP Siripala and RP Wijesundera, Photocurrent improvement in grape dye sensitized solar cells by in cooperation of electrodeposited Cu particles in TiO2 photoanode, University of Kelaniya International Conference on Applied and Pure Sciences (ICAPS 2023), 72 (2023)
25. RP Wijesundera, SAAB Thejasiri, FSB Kafi, W Siripala, Enhanced efficiency in electrodeposited cuprous oxide thin film homojunction solar cells, SPAST Abstracts (2021)
26. HE Wijesooriya, JA Seneviratne, KMDC Jayathilaka and RP Wijesundera, Use of cuprous oxide thin film semiconductors for dissolved oxygen sensing: A preliminary study, International Conference on Applied and Pure Sciences 2021 (ICAPS 2021), University of Kelaniya, Sri Lanka, PO-15 (2021)
27. MDPA Shakya, KMDC Jayathilaka, RP Wijesundera and WTMPK Wanninayake, Effect of Annealing Temperature on the Wetting Properties of Electrodeposited Cu₂O, International Conference on Applied and Pure Sciences 2021 (ICAPS 2021), University of Kelaniya, Sri Lanka, PO-17 (2021)
28. WTRS Fernando, KMDC Jayathileka, W Siripala, RP Wijesundara, Enhancement of photoactive properties of CZTS/Cu₂O solar cell by annealing, Young Scientists’ Conference on Multidisciplinary Research (YSCMR), 75 (2021)
29. SAAB Thejasiri, FSB Kafi, RP Wijesundera and W Siripala, Enhancement of photovoltaic performance of Cu₂O homojunction by introducing a ZnO buffer layer, International Conference on Applied and Pure Sciences 2020 (ICAPS 2020), University of Kelaniya, Sri Lanka, 39 (2020)
30. WTRS Fernando, KMDC Jayathilaka, RP Wijesundera and W Siripala, Comparison of the properties of CZTS semiconductor films grown by sequential and single step electrodeposition techniques, International Conference on Applied and Pure Sciences 2020 (ICAPS 2020), University of Kelaniya, Sri Lanka, 50 (2020)
31. DGKK Namawardana, G Wanigasekara, WTMAPK Wanninayake, KMDC Jayathilaka, RP Wijesunderaand, W Siripala, Fabrication of inverted polymer based organic solar cells on stainless steel substrate, International Conference on Applied and Pure Sciences 2020 (ICAPS 2020), University of Kelaniya, Sri Lanka, 51 (2020)
32. G Wanigasekara, DGKK Namawardana, WTMAPK Wanninayake, KMDC Jayathilaka, RP Wijesundera and W Siripala, Effects of ZnO on inverted P3HT:PCBMbulk heterojunction solar cells, International Conference on Applied and Pure Sciences 2020 (ICAPS 2020), University of Kelaniya, Sri Lanka, 52 (2020)
33. SAAB Thejasiri, FSB Kafi, RP Wijesundera, W Siripala, Effect of surface modification on cuprous oxide homojunction solar cells fabricated on titanium substrates, 20th International Postgraduate Research Conference, University of Kelaniya, Sri Lanka, (IPRC-2019), (2019)
34. SRNT Jayarathna, WTMAPK Wanninayake, KMDC Jayathilake and RP Wijesundara, Fabrication of efficient dye –sensitized solar cell using the dye of Chinese rain bell flower, 4^th International Research Symposium on pure and Applied Sciences (IRSPAS-2019), University of Kelaniya, Sri Lanka, 95 (2019)
35. DSV Kulathilaka, Aruna Wanninayake, KMDC Jayathilaka and RP Wijesundera, Fabrication of natural dye sensitized solar cells with eastern black nightshade extract, 4^th International Research Symposium on pure and Applied Sciences (IRSPAS-2019), University of Kelaniya, Sri Lanka, 96 (2019)
36. Geethanjana Wanigasekara, KMDC Jayathilaka, WTMAPK Wanninayake, RP Wijesundera and W Siripala, Fabrication of P3HT:PCBM based organic solar cell, 4th International Research Symposium on pure and Applied Sciences (IRSPAS-2019), University of Kelaniya, Sri Lanka, 99 (2019)
37. HAC Sankalpa, HH Sumathipala and RP Wijesundera, A new Sodium Based Electrolyte – PEO₁₀NaBrO₃, 4th International Research Symposium on pure and Applied Sciences (IRSPAS-2019), University of Kelaniya, Sri Lanka, 102 (2019)
38. WGC Kumarage, RKKGRG Kumarasinghe, RP Wijesundera, CP Jayalath, N Kaur, E Comini, BS Dassanayake, A Study on CdCl₂ Actvaton of CBD-CdS Thn Films, Symposium on Solar Energy Applcations, AMCEHA-2019, 43 (2019)
39. WGC Kumarage, RKKGRG Kumarasinghe, LDBRP Wijesundera, VA Seneviratne, CP Jayalath, BS Dassanayake, Effect of Seed Layer on Opto-Electronic Properties of CdS Thin Film, International Research Conference of UWU (2019)
40. SRNT Jayarathna, KMDC Jayathilaka, WTMAPK Wanninayake, LBDRP Wijesundera, Fabrication of Titanium Dioxide –Based Solar Cell Using Black Grapes, 74th Annual Sess., SLAAS (2018)
41. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, A Study on cheap, environmentally friendly alternative for CdCl₂ activation of CdS films: MgCl₂, Sri Lanka-Taiwan Bilateral Symposium on Energy, Environment and Nanotechnology, 01^st – 03^rd June 2018, Taiwan, 22 (2018)
42. WGC Kumarage, RP Wijesundera, N Kaur, VA Seneviratne, CP Jayalath and BS Dassanayake, A comparative assessment of opto-electronic properties of Cds thin films: chemical bath deposition and electro deposition, International Conference on Science and Engineering Materials, 6^th – 8^th January 2018, India, 125 (2018)
43. RKKGRG Kumarasinghe, WGC Kumarage, RP Wijesundera, N Kaur, E Comini, N Gunawardhana, BS Dassanayake, Opto-electric properties of chemical bath deposited CdS films fabricated under variable and steady bath conditions, AFM, 27^th-30^th August 2018, China, 93 (2018)
44. WGC Kumarage, RKKGRG Kumarasinghe, LBDRP Wijesundara, VA Seneviratne, CP Jayalath and BS Dassanayake, Comparative Assment of Cl Activation on CBD-CdS Thin Films; MgCl₂ and CdCl₂, 5^th PGIS congress, 2018, Sri Lanka, 795946, 100 (2018)
45. WGC Kumarage, RKKGRG Kumarasinghe, WKDAU Wijesinghe, LBDRP Wijesundara, VA Seneviratne, CP Jayalath and BS Dassanayake, Growth and Characterization of Seed Assisted, Cd(1-x)ZnxS with EDTA Treatment, 5^th PGIS congress, 2018, Sri Lanka, 240789, 84 (2018)
46. WTRS Fernando, KMDC Jayathilaka, RP Wijesundara and W Siripala, “Fabrication of CZTS/Cu₂O solar cell”, International Postgraduate Research Conference, University of Kelaniya, Sri Lanka, (IPRC-2018)
47. WTRS Fernando, KMDC Jayathileka, RP Wijesundera and W Siripala “Growth of photoactive Cu₂ZnSnS₄ by single step electrodeposition,” International Research Symposium on pure and Applied Science, University of Kelaniya, Sri Lanka 26^th October 2018 (IRSPAS-2018), 105 (2018)
48. FSB Kafi, KMDC Jayathileke, LBDRP Wijesundera, W Siripala, Electrodeposited homojunction Cu2O solar cell on FTO substrate, International Research Symposium on pure and Applied Science, University of Kelaniya, Sri Lanka 26th October 2018, (IRSPAS-2018), 106 (2018)
49. FSB Kafi, KMDC Jayathileke, RP Wijesundera, W Siripala, Comparison of the surface properties of post-treated p-Cu­₂O/Au Schottky junction, Proc. 73^rd SLAAS Scientific Session, 86 (2017)
50. FSB Kafi, KMDC Jayathileke, RP Wijesundera, W Siripala, Fabrication of Cu₂O homojunction thin films for photovoltaic applications, Proc. International Research Symposium Pure and Applied Sciences 2017, University of Kelaniya, 103 (2017)
51. WTRS Fernando, KMDC Jayathilaka, RP Wijesundera and W Siripala, Optimization of growth parameters of photoactive CZTS, International Research Symposium Pure and Applied Sciences 2017, University of Kelaniya, 100 (2017)
52. GKUP Gajanayake, UK Abeywarna, LBDRP Wijesundera, Investigation of electrically insulating and thermally conductive materials for a Peltier module with n-Cu2O and p-Cu2O electrodeposited semiconductors, International Research Symposium Pure and Applied Sciences 2017, University of Kelaniya, 101 (2017)
53. AGT De Silva, KMDC Jayathilaka, RP Wijesundera and W Siripala, Photoelectolysis of water usng electrodeposited Cu2O electrodes, International Research Symposium Pure and Applied Sciences 2017, University of Kelaniya, 102 (2017)
54. WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, Optical and electrical properties of EDTA assisted CdS thin films, Proceedings of the Postgraduate Institute of Science Reserch Congress, Sri Lanka, Abstract No:60 (2016)
55. WGC Kumarage, RP Wijesundara, VA Seneviratne, CP Jayalath and BS Dassanayake, Optoelectronic Properties of Cd_1−xZn_xS Thin Films Grown by Chemical Bath Deposition, ICSBE, 16^th– 18^th December 2016, Sri Lanka, 128 (2016)
56. WGC Kumarage, RP Wijesundara, VA Seneviratne, CP Jayalath and B Dassanayake, Fabrication of Seed Assisted CdS and Properties, iPURSE, 4^th – 5^th November 2016, Sri Lanka, 328 (2016)
57. FSB Kafi, KMDC Jayathileka, RP Wijesundera and W Siripala, Improvement of p-Cu₂O/Au interface by controlling the pH of the electrodeposition bath of Cu₂O, International Research Symposium on Pure and Applied Sciences, 2016, Faculty of Science, University of Kelaniya, Sri Lanka, 43 (2016)
58. WTRS Fernando, KMDC Jayathilekea, RP Wijesundera and W Siripala, Growth of CuZnS thin films by sequential electrodeposition and sulphurisation, International Research Symposium on Pure and Applied Sciences, 2016, Faculty of Science, University of Kelaniya, Sri Lanka, 42 (2016)
59. RP Wijesundera, FSB Kafi, KMDC Jayathileka and W Siripala, Growth of electrodeposited n-Cu₂O thin films with tunable band edge position, International Postgraduate Research Conference – 2016, Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, 159 (2016)
60. KAM Jeewanthi, HH Sumathipala and LBDRP Wijesundera, Investigating possibility of using indigenous oils as dialectic liquids for electrical insulation, 9th International Research Conference, KDU, Sri Lanka, 198 (2016)
61. HTN Padmini, KMDC Jayathilaka, LS Kumara, S Kohara, O Sakata, RP Wijesundera, Optimisation of photoactive properties of ZnO by electrodeposition, 9^th International Research Conference, KDU, Sri Lanka, 199 (2016)
62. FSB Kafi, KMDC Jayathilekea, RP Wijesundera and W Siripala, Observation of interface modification of electrodeposited p-Cu₂O thin films in an aqueous electrolyte, International Postgraduate Research Conference, University of Kelaniya, 209 (2015)
63. KDRN Kalubowila, RP Wijesundera and W Siripala, Fabrication of CuInS₂/Cu₂O heterojunction using electrodeposition technique to use in photovoltaic applications, 71^st Annual Sess., SLAAS, 63 (2015)
64. WGC Kumarage, LBDRP Wijesundara, VA Seneviratne, P Jayalath and BS Dassanayake, Effects of NH3 concentration and annealing temperature on CBD CdS thin films, Proc. Postgraduate Institute of Science Research Congress, Sri Lanka, 122 (2014)
65. LKADDS Gunawardhana, RP Wijesundera and W Siripala, Cu₂O homojunction solar cell, Proc. HETC Symposium – 2014, Sri Lanka, 130 (2014)
66. LKADDS Gunawardhana, RP Wijesundera and W Siripala, Fabrication of Cu₂O Homojunction Solar Cell, Proceedings of 14th Annual Research Symposium 2013, University of Kelaniya, 92 (2013)
67. KDRN Kalubowila, RP Wijesundera and W Siripala, Improved n-type behaviour of Cu₂O by successive electrodeposition of Cu and Cu₂O, Proceedings of 14th Annual Research Symposium 2013, University of Kelaniya, 94 (2013)
68. LKADDS Gunawardhana, RP Wijesundera and W Siripala, Improved n-type photoconductive Cu₂O thin films, 69th Annual Sess., SLAAS, 129 (2013)
69. KDRN Kalubowila, RP Wijesundera and W Siripala, Growth of (Cu₂O)_1-x(CuO)_x thin films for PV applications, 69th Annual Sess., SLAAS, 130 (2013)
70. Nandana Jayashantha, RP Wijesundera and KD Jayasuriya, Electrical Batteries from Plantain Pith, Proc. 12th Annual Research Symp. 2011, University of Kelaniya, 71 (2011)
71. AMB Chandima, KAS Pathiratne, IM Darmadasa, RP Wijesundera and DSMDe Silva, Electochemical deposition of CuInTe₂ layers for applications in thin film solar cells, of 66^th Annual Sess., SLAAS, 108 (2010)
72. WPMR Pathirana, RP Wijesundera and W Siripala, Growth of CuInS₂ thin films by annealing Cu-In stack layers with elemental sulphur for photovoltaic applications, Proc. 10th Annual Research Symp. 2009, University of Kelaniya, 117 (2009)
73. AMB Chandimal, KAS Pathiratne, IM Darmadasa, RP Wijesundera and DSM De Silva, Investigation of growth parameters of CuInTe₂ thin films by electrodeposition technique, Proc. 10th Annual Research Symp. 2009, University of Kelaniya, 96 (2009)
74. AWS Chandana, SRD Kalingamudali, RP Wijesundara and KD Jayasuriya, Design of an Inexpensive Digital Watt-hour Meter, IEE Tenth Annual Conference, Sri Lanka (2003)
75. RP Wijesundera and W Siripala, Photoelectrolysis of water using double-semiconductor electrodes, Annual Research Symp. 2003, University of Kelaniya, 59 (2003)
76. UK Abeywarna, EPPC Gunawardana, DN Bopege, R Rajapaksha, RP Wijesundera and W Siripala, A study on Peltier effect with n-type cuprous oxide and p-type cuprous sulphide semiconductors, Annual Research Symp. 2003, University of Kelaniya, 58 (2003)
77. RP Wijesundera, W Siripala and R Garuthara, A Photoluminescence Study on CuInS₂ Thin Films Prepared by the Sequential Deposition Technique, Annual Research Symp. 2001, University of Kelaniya, 43 (2001)
78. RP Wijesundara, W Siripala, KD Jayasuriya and SRD Kalingamudali, Sulphurisation of sequentially electrodeposited Cu-In alloy for the preparation of semiconductor thin films, Proc. Annual Research Symp. 2000, University of Kelaniya, 32 (2000)
79. RP Wijesundara, W Siripala, KD Jayasuriya and SRD Kalingamudali, I-V and C-V characterization of semiconductor thin films, Proc. Annual Research Symp. 2000, University of Kelaniya, 31 (2000)
80. RP Wijesundara, W Siripala, KD Jayasuriya, SRD Kalingamudali, KTL De Silva, and JKDS Jayanetti, Photoelectrochemical Characterisation of ZnSe coated Copper Indium Sulphide Thin Film Electrodes, Proc. 55^th Annual Sess., SLAAS, 203 (1999)
81. LDRD Perera, RP Wijesundera, W Siripala, KD Jayasuriya, KTL De Silva and JKDS Jayanetti, ITO/n-Cu₂O/p-Cu_xS Thin Film Solar Cell, of 53^rd Annual Sess., SLAAS, 290 (1997)

Poster presentations

1. WGC Kumarage, LBDRP Wijesundara, V Seneviratne, CP Jayalath and BS Dassanayake, Effect of bath temperature on CBD CdS thin films, 8th International Conference on Materials for Advanced Technologies, 28th June – 3rd July 2015, Suntec, Singapore (2015)
2. WMND Kulasinghe, WTMAPK Wanninayaka, KMDC Jayathilaka and RP Wijesundera, Growth of photoactive CZTS thin film by using spin coating technique, 74th Annual Sess., SLAAS (2018)

h-index (Google Scholar): 18

Total Citations: 1150

• Editorial board memberships
• Conference organization
• Reviewer duties
• Industry collaborations
• Consultancy work
• Community engagement