• Growth and characterisation of semiconductor thin films using electrodeposition technique for photovoltaic applications

• Study of structural properties and electronic band states near the Fermi level in electrodeposited semiconductors using X-ray absorption spectroscopy (EXAFS and XANES)

• Fellow and Chartered Physicist, The Institute of Physics, Sri Lanka 

• H Zahadiya, RP Wijesundera, CV Hettiarachchi, I R Perera, Effect of Benzene Derivatives as Guest Molecules on Semiconductor Properties of MOF‐199, ChemistrySelect, 6 (3), 425-429 (2021)

• FSB Kafi, RP Wijesundera, W Siripala, Enhanced Photoelectrochemical Water Splitting by Surface Modified Electrodeposited n‐Cu2O Thin Films, Phys. Status Solidi A, 2000330, (2020)

• 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)

• 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)

• 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)

• SAAB Thejasiri, FSB Kafi, RP Wijesundera and W Siripala, Enhancement of photovoltaic performance of Cu2O homojunction by introducing a ZnO buffer layer, Proceedings International Conference on Applied and Pure Sciences 2020 (ICAPS 2020 - Kelaniya), University of Kelaniya, Sri Lanka, 39 (2020)

• 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, Proceedings International Conference on Applied and Pure Sciences 2020 (ICAPS 2020 - Kelaniya), University of Kelaniya, Sri Lanka, 50 (2020)

• DGKK Namawardana, G Wanigasekara, WTMAPK Wanninayake, KMDC Jayathilaka, RP Wijesundera and W Siripala, Fabrication of inverted polymer based organic solar cells on stainless steel substrate, Proceedings International Conference on Applied and Pure Sciences 2020 (ICAPS 2020 - Kelaniya), University of Kelaniya, Sri Lanka, 51 (2020)

• G Wanigasekara, DGKK Namawardana, WTMAPK Wanninayake, KMDC Jayathilaka, RP Wijesundera and W Siripala, Effects of ZnO on inverted P3HT:PCBM bulk heterojunction solar cells, Proceedings International Conference on Applied and Pure Sciences 2020 (ICAPS 2020 - Kelaniya), University of Kelaniya, Sri Lanka, 52 (2020)

• FSB Kafi, K Jayathileka, RP Wijesundera, W Siripala, Improvement of photovoltaic properties of n-Cu2O/Au Schottky junctions, Materials Research Express, 6 (8), 085520 (2019)

• 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)

• 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)

• WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath, T Varga, BS Dassanayake, Optical, structural and photo electrochemical properties of Cd1− xZnxS films grown by chemical bath deposition, Applied Physics A 124 (7), 494 (2018)

• 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)

• 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)

• 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)

• 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, (2019)

• 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)

• 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)

• 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)

• 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)

• SRNT Jayarathna, KMDC Jayathilaka, WTMAPK Wanninayake, LBDRP Wijesundera, Fabrication of Titanium Dioxide–Based Solar Cell Using Black Grapes, 74th Annual Sess., SLAAS (2018)

• 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, 01st - 03rd June 2018, Taiwan, pp 22 (2018)

• 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, 6th – 8th January 2018, India (2018)

• 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, 27th-30th August 2018, China, pp 91.

• BS Dassanayake, WGC Kumarage, RP Wijesundera, VA Seneviratne and CP Jayalath, Fabrication and Characterization of Seed Assisted, EDTA Treated Chemical Bath Deposited CdS, Sri Lanka-Taiwan Bilateral Symposium on Energy, Environment and Nanotechnology, 01st - 03rd June 2018, Taiwan.

• 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, 5th PGIS congress, 2018, Sri Lanka, 795946 pp100. (2018)

• 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, 5th PGIS congress, 2018, Sri Lanka, 240789 pp 84 (2018)

• 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)

• 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 26th October 2018 (IRSPAS-2018)

• FSB Kafi, KMDC Jayathileke, RP Wijesundera, W Siripala, Comparison of the surface properties of post-treated p-Cu­2O/Au Schottky junction, Proc. 73rd SLAAS Scientific Session, pp. 86 (2017)

• 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, pp.103 (2017)

• 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 (2017)

• 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)

• WTRS Fernando, KMDC Jayathilekea, RP Wijesundera and W Siripala, Growth of CuZnS thin films for PV applications, Proc. 33rd Tech. Sess. Inst. Phys., Sri Lanka, pp. 12-18 (2017)

• KAM Jeewanthi, RP Wijesundara and HH Sumathipala, Study of dielectric properties of indigenous oils as a possible alternative liquid for mineral oils, Proc. 33rd Tech. Sess. Inst. Phys., Sri Lanka, pp. 19-23 (2017)

• WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, Growth, Optical, Structural, Morphological and Photoelectrochemical Properties of Cd1−xZnxS Films, International Conference on Sustainable Built Environment (ICSBE) 2016, pp. 59-64, (2017)

• 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)

• 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)

• 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 )

• WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, Tunable optoelectronic properties of CBD-CdS thin films via bath temperature alterations, J. Phys. D: Appl. Phys., 49 (9), 095109 (2016)

• 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)

• FSB Kafi, K.M.D.C. 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, p. 43 (2016)

• WT R S 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, p. 42 (2016)

• FSB Kafi, KMDC Jayathileka, RP Wijesundera 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, p. 159 (2016)

• 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, p.198 (2016)

• HTN Padmini, KMDC Jayathilaka, LS Kumara, S Kohara, O Sakata, RP Wijesundera, Optimisation of photoactive properties of ZnO by electrodeposition, 9th International Research Conference, KDU, Sri Lanka, p.199 (2016)

• WGC Kumarage, RP Wijesundera, VA Seneviratne, CP Jayalath and BS Dassanayake, Optical and electrical properties of EDTA CdS thin films, Proceeding of the Postgraduate Institute of Science Research Congress, p. 119 (2016)

• 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)

• KDRN Kalubowila, RP Wijesundera and W Siripala, Fabrication of CuInS2/Cu2O heterojunction using electrodeposition technique to use in photovoltaic applications, 71st Annual Sess., SLAAS (2015)

• K D R N Kalubowila, R P Wijesundera and W Siripala, Electrodeposited CuO/Cu2O heterojunction for PV applications, Proc. 31st Tech. Sess. Inst. Phys., Sri Lanka, pp. 69-75 (2015)

• K S Janaka Kumara, R P Wijesundera and K D Jayasuriya, 2015, Plantain Pith Battery Powered Lighting System, Proc. 31st Tech. Sess. Inst. Phys., Sri Lanka, pp. 29-37 (2015)

• W G C Kumarage, L B D R P Wijesundara, V A Seneviratne, C P Jayalath and B S Dassanayake, Effects of NH3 concentration and annealing temperature on CBD CdS thin films, Proc. Postgraduate Institute of Science Research Congress, Sri Lanka, p. 122 (122)

• L K A D D S Gunawardhana, R P Wijesundera and W Siripala, Cu2O homojunction solar cell, Proc. HETC Symposium - 2014, Sri Lanka, p. 130 (2014)

• KDRN Kalubowila, LKADDS Gunawardhana, RP Wijesundera, W Siripala, Methods for improving n-type photoconductivity of electrodeposited Cu2O thin films, Semi. Sci. Technol., 29(7), 075012, pp. 1-7 (2014)

• K D R N Kalubowila, R P 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)

• L K A D D S Gunawardhana, R P 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)

• L K A D D S Gunawardhana, R P Wijesundera and W Siripala, Fabrication of Cu2O Homojunction Solar Cell, Proceedings of 14th Annual Research Symposium 2013, University of Kelaniya, p 92 (2013)

• K D R N Kalubowila, R P 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, p 94 (2013)

• L K A D D S Gunawardhana, R P Wijesundera and W Siripala, Improved n-type photoconductive Cu2O thin films, 69th Annual Sess., SLAAS, p 129 (2013)

• K D R N Kalubowila, R P Wijesundera and W Siripala, Growth of (Cu2O)1-x(CuO)x thin films for PV applications, 69th Annual Sess., SLAAS, p 130 (2013)

• 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)

• 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)

• 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)

• N Jayashantha, K D Jayasuriya and R P Wijesundera, Biodegradable Plantain Pith for Galvanic Cells, Proc. 28th Tech. Sess. Inst. Phys., Sri Lanka, pp. 92-99 (2012)

• K M Kumarasiri, R P Wijesundera and U K Abeywarna, Investigation of the Peltier Cooling Effect Using Low Cost n-Cu2O and p-Cu2S Semiconductors, Proc. 28th Tech. Sess. Inst. Phys., Sri Lanka, pp. 71-76 (2012)

• M Abdulla-Al-Galib, K M A Salam, M A Awal and R P 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)

• Mir Abdulla-Al-Galib, Soumen Barua, K. M. A. Salam, Mohammad A. Awal, R. P. Wijesundera, 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)

• Nandana Jayashantha, R P Wijesundera and K D Jayasuriya, Electrical Batteries from Plantain Pith, Proc. 12 th Annual Research Symp. 2011, University of Kelaniya, p 71 (2011)

• Mir Abdulla-Al-Galib, Soumen Barua, K M A Salam and R P Wijesundera, Effects of Indium-Phosphide-Oxide on Photon Absorption of Multijunction Photovoltaic Cells, International Proceedings of Computer Science and Information Technology, ISSN:2010-460X, 21, pp 211-215 (21 Dec 2011)

• RP Wijesundera and M Hidaka, Fabrication of CuO/Cu2O Heterojunction and Its Local Structural Characterization, Proc. Inte. Conf. (Solar Asia 2011), Kandy, Sri Lanka, pp. 105-111, (2011)

• 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)

• M. Hidaka1, K. Ohashi, R. P. Wijesundera, L. S. R. Kumara, M. Watanabe, K. Koga, Jae-Young Choi, 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 (I), Cerāmica 57, pp.106-114 (2011)

• A M B Chandima, K A S Pathiratne, I M Darmadasa, R P Wijesundera and D S M De Silva, Electochemical deposition of CuInTe2 layers for applications in thin film solar cells, Proc. of 66th Annual Sess., SLAAS, p 108 (2010)

• 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), pp. 19-25 (2010)

• RP Wijesundera, Fabrication of CuO/Cu2O heterojunction using electrodeposition technique for solar cell applications, Semi. Sci. Technol. , 25(4), 045015, pp. 1-5 (2010)

• 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, (2009)

• 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, (2009)

• M Hidaka, H Horiuchi, K Ohashi, RP Wijesundera, LSR Kumara, NE Sung, Local structures and electronic band states of á-Fe2O 3 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), pp. 223-232 (2009)

• 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)

• 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-xLaxTi3O12; 0.0 < x < 1.46, Ceramics-Silikaty 53 (2), pp. 118-127 (2009)

• 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, Ceramics International, 35 (2), pp. 875-886 (2009)

• 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)

• 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)

• 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), pp. 2565-2575 (2007)

• 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), pp. 1791–1801 (2006)

• 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 TbBaCo2O5.5, Physica Status of Solidi (b), 243 (8), pp. 1813–1822 (2006)

• 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, pp. 241-246 (2006)

• 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,pp. 147-154 (2004)

• RP Wijesundera, NKAC Kodiweera, W Siripala, and R Garuthara, Electronic Band Gap States in Electrodeposited Cuprous Oxide Semiconductors, Proc. 20th Tech. Sess. Inst. Phys., Sri Lanka, pp. 75-80 (2004)

• 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)

• AWS Chandana, SRD Kalingamudali, RP Wijesundara and KD Jayasuriya, Design of an Inexpensive Digital Watt-hour Meter, Proc. IEE Tenth Annual Conference, Sri Lanka (2003)

• RP Wijesundera, PK Kapila Susantha, JRP Jayakody, W Siripala, Ti/Cu2O Photoelectrodes in a Photoelectrolytic Solar Cell, Proc. 19th Tech. Sess. Inst. Phys., Sri Lanka, pp. 59-64 (2003)

• RP Wijesundera and W Siripala, Photoelectrolysis of water using double-semiconductor electrodes, Proc. Annual Research Symp. 2003, University of Kelaniya, p 59 (2003)

• 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, Proc. Annual Research Symp. 2003, University of Kelaniya, p 58 (2003)

• 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, pp. 50-54 (2002)

• RP Wijesundera, W Siripala and R Garuthara, A Photoluminescence Study on CuInS2Thin Films Prepared by the Sequential Deposition Technique, Proc. Annual Research Symp. 2001, University of Kelaniya, p 43 (2001)

• 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)

• 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. 16th Tech. Sess. Inst. Phys., Sri Lanka, pp. 63-70 (2000)

• 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, p. 32 (2000)

• 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, p. 31 (2000)

• 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. 15th Tech. Sess. Inst. Phys., Sri Lanka, pp. 52-58 (1999)

• 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)

• 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. 55th Annual Sess., SLAAS, p. 203 (1999)

• RP Wijesundara, SRD Kalingamudali and KD Jayasuriya, Construction of a near ideal nanoammeter, Proc. 14th Tech. Sess. Inst. Phys., Sri Lanka, pp. 50-53 (1998)

• W Siripala, RP Wijesundera, LDRD Perera, KD Jayasuriya and KTL De Silva, Study of sulphidation of electrodeposited Cu2O thin films for solar cell applications, Proc. Wkshp. on Renewable Energy Sources, Colombo, pp 89-94 (1998)

• LDRD Perera, RP Wijesundera, W Siripala, KD Jayasuriya, KTL De Silva and JKDS Jayanetti,ITO/n-Cu2O/p-CuxS Thin Film Solar Cell, Proc. of 53rd Annual Sess., SLAAS, p 290 (1997)

1. Presidential Awards for Research 2000, 2003, 2004, 2006, 2008, 2016

2. NRC Merit Awards for Scientific Publications in 2010, 2014, 2016

3. The Vice Chancellor’s Awards 2006, 2010, 2014, 2018

4. Senate Honours 2014 (1), 2016 (4), 2017 (2), 2018 (4), 2019 (1)

5. Monbukagakusho, Japanese Government Research Scholarship 2004-2008 (Kyushu University)

6. Commonwealth Scholarship, New Zealand 2004 (University of Canterbury)

Patents:

i. International Publication under Patent Cooperation Treaty (PCT)

• 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 Organization - https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2022189847&_cid=P20-L8E3Q1-87682-1

ii. Sri Lankan Patents

• 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, processing, control, and visualization based on RF wireless communication with or without an Internet connection, Sri Lankan Patent No 21656. National Intellectual Property Office

iii. Sri Lankan Patents (Pending)

1. RMIU Rajapaksha, PLAK Piyumal, LDPS Jayasekara, TN Gurusinghe, , HE Wijesooriya, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). AI-based Smart LP Gas Level Indicator, Sri Lankan Patent No 22121. National Intellectual Property Office

2. LDPS Jayasekara, HE Wijesooriya, TN Gurusinghe, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Addressable Data Communication System for Industry Automation and Industrial Internet of Things (IIoT) Based on Controller Area Network (CAN) Protocol, Sri Lankan Patent No 22424. National Intellectual Property Office

3. 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/propane Sensitive Safety Electrical Switch, Sri Lankan Patent No 22450. National Intellectual Property Office

4. 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. National Intellectual Property Office

5. HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, RMIU Rajapaksha, MPAV Gunawardhana, 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. National Intellectual Property Office

Industrial Designs:

1. RMIU Rajapaksha, MPAV Gunawardhana, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Safety Electrical Switch, Sri Lankan Industrial Design No 13787

2. HE Wijesooriya, RMIU Rajapaksha, LDPS Jayasekara, TN Gurusinghe, MPAV Gunawardhana, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali Internet Independent Wireless Real-Time Water Quality Monitoring Unit, Sri Lankan Industrial Design No 13786

3. RMIU Rajapaksha, PLAK Piyumal, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Emergency Shut Off Liquid Petroleum Gas Regulator for Domestic Use, Sri Lankan Industrial Design No 13613

4. RMIU Rajapaksha, PLAK Piyumal, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Smart Liquid Petroleum Gas Level Indicator, Sri Lankan Industrial Design No 13554

Industrial Designs (Pending):

1. RMIU Rajapaksha, MPAV Gunawardhana, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Digital Irrigation Control Unit, Sri Lankan Industrial Design No 13741

2. TN Gurusinghe, RMIU Rajapaksha, HE Wijesooriya, LDPS Jayasekara, MPAV Gunawardhana, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Individually Controllable Parametric Speaker Array, Sri Lankan Industrial Design No 13785

Commercialised innovations:

1. The innovation Remotely Controllable Regulator Connected in Series with Resistive and Inductive Loads has been commercialised with Orel Corporation (Private) Limited, and the product launch was held on April 2023

2. In addition, Patent numbers 20365, 21656, 22121, 22424, and 22450 are already being commercialised with 8 License agreements and waiting for the product launches

• Fellow, The Institute of Physics, Sri Lanka