Blog

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           – Prof.K.Kandasamy

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• Hybrid metal oxide / polymer solar cells 
  

           – Prof.P.Ravirajan, Mr.K.Balashangar, Mr.S.Loheswaran, Mr.M.Thanihaichelvan, Mr.K.Prashanthan 

Controlling charge recombination using alumina over layer		The Alumina coating on TiO2 nano particles in TiO2 / Polymer solar cells serves multiple functions—as physical barrier layers for charge recombination reactions to affect the photo induced charge transfer at the interface, as a means of passivation of TiO2 surface trap states, and to improve the exciton dissociation efficiency at the polymer / TiO2 interface ……… Loheeswaran et al Journal of Nanoelectronics and Optoelectronics 8, 484-488 (2013).
Improving charge transport using nanorods		Charge recombination in the structures containing vertically aligned ZnO nanorods is remarkably slow, with a half-life of several milliseconds, over 2 orders of magnitude slower than that for randomly oriented ZnO nano-particles. Overall power conversion efficiency of device with nanorods is over four times greater than that for a similar device based on the nanoparticle structure Ravirajan, P. et al. Journal of Physical Chemistry B 110, 7635-7639, (2006).

•  Quantum Dot Sensitised Solar cells (QDSSC)

             – Prof.P.Ravirajan, Mr.M.Thanihaichelvan 

		Insertion of cadmium sulfide (CdS) QDs at the nanocrystalline TiO2 / P3HT interface improve the efficiency of TiO2/P3HT solar cells by a factor three by broadening the quantum efficiency spectrum and controlling the recombination kinetics ……. Thanihai et. al Journal of Material Science: Materials in Electronics 26, 3558-3563, (2015).

 

• Nano-pyramid textured silicon solar cells

           – Mr.S.Senthuran  

collaboration with Prof. Maan M. Alkaisi, University of Canterbury, Christchurch, New Zealand.

Texturing the surface of solar cell is one of the techniques widely used  for efficient light trapping. We are investigating the impact of sub-wavelength scale texturing ( eg: Nanopyramid, Nanocone, etc) in light trapping for next generation silicon solar cell and thin film solar cells. Influence of quantum dots ( CdSe, Si ) coating for light absorption in nanostrutured solar cells are also being studied. S. Senthuran et. al, ” Inverted nanopyramid texturing for silicon solar cells using interference lithography”, Journal of Microelectronics Engineering, 119 C, pp. 146-150, (2014)

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            – Dr.Ms.S.Ubenthiran

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Research Facilities

Research laboratories of the department have excellent facilities for fabricating and characterisation of organic based solar cells

Thermal Evaporator & Fume hood	UV-VIS spectrometer &  Solar simulator	Programmable Spin-coater
Closed cycled croystat	Nanoenclosure	Pulsed laser

The department acknowledges National Research Council for their financial assistance to purchase most of these equipment through its Investigator Driven Research Grants.

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National and International Research grants (> 35 million rupees) won by the staff for the following projects 

where

University Research Grants (4 millions rupees) won by the staff for the following projects 

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• Characterisation of solar cells made from nanocrystalline TiO2 and a fluorene-thiophene copolymer, P. Ravirajan, S. A.Haque, D. Poplavskyy, J. R. Durrant, D. D. C. Bradley and J. Nelson, The 2002 Annual Conference of the British Association for Crystal Growth, The University of Liverpool, Liverpool, UK, 8 – 10 September 2002.
• Characterisation of thin film nanocrystalline TiO2 solar cells with fluorene-thiophene copolymer as a hole conductor, P. Ravirajan, S. A. Haque, D. Poplavskyy, J. R. Durrant, D. D.C.Bradley, and J. Nelson, Bi-annual conference of the Solar Energy Society, Loughborough University, Loughborough, UK April 3-4, 2003.
• Photovoltaic Device based on nanocrystalline TiO2 and a fluorene-thiophene copolymer, P. Ravirajan, S. A. Haque, D. Poplavskyy, J. R. Durrant, D. D.C.Bradley, and J. Nelson, Discussion Meeting on Functional Mechanisms in Organic and Dye sensitised Solar cells, Imperial College London, UK, July 9-10, 2003.
• Polymer-fullerne blend and polymer-TiO2 hybrid solar cells, P.Ravirajan, S. A. Choulis, S. A. Haque, J. Nelson, J. R. Durrant and D. D. C.Bradley, Science Bazaar on Organic and Dye Sensitized solar cells, Linz, Austria, September 18-19, 2003.
• Effect of Morphology on Electron Drift Mobility in Porous TiO2, B.O. Aduda, P.Ravirajan, K.W. Choy, and J. Nelson, The 7th International Conference on Solar Energy and Applied Photochemistry [SOLAR ’03] Luxor, Egypt, 23-28 February 2003.
• New hole-conductors for solid-state dye sensitised nanocrystalline solar cells, S. A. Haque, T. Park, C. Xu, R. Punniamoorthy, J. Nelson, S. Koops, N. Schultes, L. Ottley, R. J. Potter, A. B. Holmes and J. R. Durrant. MRS Spring Meeting, San Francisco, USA, April 21- 25, 2003
• Photovoltaic devices based on nanocrystalline TiO2 and a fluorene-thiophene copolymer P. Ravirajan, S. A. Haque, D. Poplavskyy, E. Palomares, James R. Durrant, DonalD.C.Bradley, and Jenny Nelson, 3rd World Conference on Photovoltaic Energy Conversion, Osaka, Japan, May 11-18, 2003.
• Multi-layer solar cells based on nanoporous TiO2 and a fluorene-thiophene copolymer, P. Ravirajan, J. R. Durrant, D. D.C.Bradley, and J. Nelson, MRS Fall Meeting, Boston, USA, December 1-5, 2003.
• Efficient hybrid polymer / TiO2 solar cell using PEDOT:PSS as hole collector, P. Ravirajan, S. A. Haque, J. R. Durrant, D. D.C.Bradley, and J. Nelson, International conference on Physics, Chemistry and Engineering of Solar cell (SCELL 2004), Badajoz, Spain, May 13-15th, 2004.
• Improvement of charge collection in hybrid polymer / TiO2 solar cell using PEDOT:PSS as hole collector, P. Ravirajan, S. A. Haque, J. R. Durrant, D. D.C.Bradley, and J. Nelson, 15th  International Conference on Photochemical Conversion and Storage of Solar Energy (IPS-15),  Paris, France, July 4-9, 2004.
• Metal oxide / polymer nanocomposite films for light-driven deoxygenation and solar cells, A. M. Peiró, C. Colombo, P. Ravirajan, L. Xiao, G. Doyle , A. Mills, J. Nelson, J. R. Durrant, 15th International Conference on Photochemical Conversion and Storage of Solar Energy (IPS-15),  Paris, France, July 4-9, 2004.
• Controlling recombination kinetics of hybrid polymer / metal oxide solar cells, P. Ravirajan, A. M. Peiró, M. Mohr, J. R. Durrant, D.D.C.Bradley and J. Nelson, E-MRS spring meeting, Strasbourg (France), 31st of May- 3rd of June 3, 2005.
• The effect of zinc oxide microstructure on the performance of hybrid polymer / zinc oxide solar cells, A. M. Peiró, P. Ravirajan, D.D.C. Bradley, J. R. Durrant, and J. Nelson, Organic Photovolatic symposium, SPIE conference, Organic Photovoltaics IV,  31st July – 4 august 2005, San Diego, California USA.
• Influence of  ZnO Nanoparticle Morphology on the function of Hybrid Polymer / Metal Oxide Solar Cells, A. M. Peiró, P. Ravirajan, K. Govender, D. Smyth-Boyle, P. O’Brien, D.D.C.Bradley, J. Nelson J. R. Durrant, International conference on Functional Materials for the 21st Century, ,University of Edinburgh, UK, 5 – 8 July 2005.
• The effect of temperature on the performance of Titanium dioxide / fullerene:poly(3-hexylthiophene) hybrid solar cells, K. Haridas, P. Ravirajan, S. Sivaraya, Y. Kim, and J. Nelson, Asian Conference on Solar Energy Materials and Solar Cells (ACSEMSC), Kandy, Sri Lanka (14-16 June 2006.
• Controlling recombination kinetics of hybrid polymer / metal oxide solar cells using ZnOnanorods or self-assembly monolayer, P. Ravirajan, A.M. Peiro´, D.D.C. Bradley, J.R. Durrant, and J. Nelson, European Conference on Hybrid and Organic Solar Cells, Paris, 28-30 June, 2006.
• Performance of Titanium dioxide / fullerene:poly(3-hexylthiophene) hybrid solar cells under different temperatures, P. Ravirajan, K. Haridas, S. Sivaraya, Y. Kim, and J. Nelson, European Conference on Hybrid and Organic Solar Cells, Paris, 28-30 June, 2006.
• Factors controlling open circuit voltage of polymer: titanium dioxide hybrid solar cells, T. Ishwara, P. Ravirajan and J. Nelson, E-MRS 2007 Spring Meeting, Strasbourg, France – May 28th to June 1st, 2007.
• Photovoltaic devices based on polymer / metal oxide composite films, P.Ravirajan, J. Boucle, and J. Nelson, National Conference on Advanced Materials For Emerging Technologies (NCAMET 2007), Peradeniya, 21 – 22 July 2007 (invited talk).
• T.Jaseetharan, K.Jeyakanthan, S.Satchithananthan, M. Senthilnanthanan, S.Sarathchandran, S.Sivaraya and P.Ravirajan, Solid state solar cells made from nanocrystalline TiO2 with plant pigments as sensitizers, 15th Annual Sessions of Jaffna Science Association, Jaffna, 7-9, May 2008 (15) 53. (ISSN 1800-1289).
• Hybrid Organic / Inorganic Solar cells: Interface Modification studies, T.Ishwara, P.Atitenzar, P.Ravirajan, J.R.Durrant and Jenny Nelson, International conference on “Advances in continuum Mechanics, Materials Sciences, Nanosciences and Technology, University of Peradeniya, September 26-27, 2008.
• Post processing treatments of Poly(3-hexylthiophene): Nanostructured Titanium dioxide films for applications to hybrid Solar cells: P.Ravirajan, T.Ishwara, P.Atitenzar, J.R.Durrant and Jenny Nelson, International conference on “Advances in continuum Mechanics, Materials Sciences, Nanosciences and Technology, University of Peradeniya, September 26-27, 2008.
• Efficient Multilayer polymer/TiO2 solar cells, P.Ravirajan, T.Ishwara, P.Atitenzar, J.R.Durrant and Jenny Nelson, SID Organic Electronics, Imperial College, September 16-17, 2008.
• Utilisation of Plant Pigments in Dye-Sensitized Nanoporous TiO2 Solar Cells, T. Jaseetharan, S.Sarathchandran, K.Jeyakanthan, M.Senthilnanthanan, S.Sivaraya and P.Ravirajan, 17th International Conference on Photochemical Conversion and Storage of Solar Energy, Sydney, Australia 27 July – 1 August 2008.
• Origin of open-circuit voltage of hybrid metal oxide / polymer solar cells, P. Ravirajan Thilini Ishwara, Donal Bradely and Jenny Nelson, IUMRS-ICEM 2008, International Conference on Electronic Materials 2008, Sydney, Australia – 28 July to 1 August 2008.
• Effect of temperature and illumination intensity on the performance of Titanium dioxide/Fullerene: Polymer solar cells, S.Sarathchandran, K.Harithas, Y.Kim & P.Ravirajan, International conference on Renewable energy source, Kyungpook National University, South Korea, May 14, 2010.
• K. Balashangar, S. Sarathchandran and P. Ravirajan, Enhancing the performance of Hybrid TiO2/polymer Solar Cells by replacing nanoporous TiO2 layer with Single Wall carbon Nanotube (SWNT): TiO2 blend, International conference on New & Renewable energy 2011, Kyungpook National University, South Korea, April 8, 2011.
• P. Ravirajan, Novel Device Structure for TiO2-Polymer Solar Cells using Single Wall Carbon Nanotube (SWNT)Workshop on New Materials for Renewable Energy, 17 – 21 October 2011,  ICTP, Trieste, Italy.
• Improving the Performance of Hybrid TiO2/Polymer Solar Cells Using Functionalized Single Wall Carbon Nanotube, P. Ravirajan P. A. Amalraj and K. Balashangar, International Conference on New & Renewable Energy 2012 (ICNRE 2012), KNU, South Korea.
• Improving the Performance of Titanium Dioxide/Polymer Solar Cell by Introducing Monolayers at the Interface, S.Loheeswaran, P.A.Amalraj, K.Balashangar and P.Ravirajan, Proceedings of the Abstracts of Jaffna University International Research Conference (JUICE -2012), 187, University of Jaffna.
• Controlling recombination kinetics of hybrid nanocrystalline titanium dioxide / polymer solar cell by inserting an alumina layer at the interface, S. Loheeswaran, K. Balashangar, J. Jevirshan and P. Ravirajan, International Conference on New & Renewable Energy 2013 (ICNRE 2013), KNU, South Korea.
• Improving the Photovoltaic properties of hybrid Polymer/ Titanium Dioxide Solar cells by self- assembled monolayers at the interface, S. Loheeswaran, K. Balashangar, and P. Ravirajan, 2nd International Conference of the Solar energy materials, Solar cells and Solar energy applications (Solar Asia 2013), University of Malaya, Kuala Lumpur, Malaysia, August 22-24, 2013.
• ‘Effect of Surface Roughness of the substrates on the Performance of Polycrystalline CdS/CdTe Solar cells’, M. Thanihaichelvan, K. Balashangar, P. Ravirajan,  G.D.K. Mahanama, M.A.K.L. Dissanayake, R. Dhere, E. Colegrove, and S. Sivananthan, Proceedings of The 2013 U.S. Workshop on Physics and Chemistry of II-VI Materials, Sep 30 – Oct 03, 2013, Chicagi, IL, USA, 29-34.
• Optimizing growth process of CdS semiconductor thin films for efficiency enhancement in CdS/CdTe solar cells, K.Paramanathan, M.A.K.L.Dissanayake, G.K.R.Senadeera, C.A. Thotawattage, P.Ravirajan, International conference RISTCON 2014, January 22, 2014. University of Ruhuna, Sri Lanka.
• Inverted P3HT:PCBM bulk heterojunction Solar Cells with Cadmium Sulfide (CdS) as theHole blocking layer, M. Thanihaichelvan, P. Ravirajan, J. Jeong and Y. Kim, International conference RISTCON 2014, January 22, 2014. University of Ruhuna, Sri Lanka
• Improved performance of dye sensitized solar cells made with visible light responsive Titanium dioxides, T. Kulatheepan, K. Balashangar, P. Ravirajan and M. Senthilnanthanan, The international Conference on Nanoscience and Nanotechnology (ICNST 2014), August12&13, 2014, Colombo, Sri Lanka
• Cadmium Sulfide (CdS) Quantum dots (QD) on vertically aligned Zinc Oxide (ZnO) nanorods for Photovoltaic Application, M. Thanihaichelvan and P. Ravirajan, The international Conference on Nanoscience and Nanotechnology (ICNST 2014), August12&13, 2014, Colombo, Sri Lanka
• Super-Strong Melts, Slow Homogenization, Reversibility Windows and Topological Phases in Chalcogenide Glasses, P. Boolchand, C. Holbrook, K. Vignarooban and R. Bhageria, Proceedings of the 7th International Conference on Amorphous and Nanostructured Chalcogenides – Fundamentals and Applications, Cluj-Napoca, Romania, July 5-10, 2015
• TiO2 Nano-Filler and EC Plasticizer in Lithium-ion Conducting Solid Polymer Membranes, K. Vignarooban, M.A.K.L. Dissanayake, I. Albinson and B.-E. Mellander, Proceedings of the Workshop on Materials Science for Energy Storage, ICTP (International Center for Theoretical Physics), Trieste, Italy, May 11-15, 2015
• Network Dimensionality and Alkali-Modification Driven Elastic Phases in Alkali-Borates, K. Vignarooban, P. Boolchand,  M. Micoulaut, M. Malki, and R. Kerner, Proceedings of the 8th International Conference on Borate Glasses, Crystals and Melts, Pardubice, Czech Republic, June 30-July 4, 2014
• Metal-Chloride Eutectic Mixture Based Heat-Transfer Fluids for Concentrating Solar Power Applications, K. Vignarooban, C. Tucker, D. Gervasio and A.M. Kannan, Proceedings of the Conference on Nano and Giga Challenges in Electronics, Photonics and Renewable Energy, Phoenix, AZ, USA, March 10-14, 2014
• Evidence for Self-organization in Li- and Na-Borate Glasses, K. Vignarooban, M. Malki, M. Micoulaut, W. Bresser, R. Kerner, R. Bhageria, V. William and P. Boolchand, Proceedings of the 10th Pacific Rim Conference on Glass and Ceramic Technology, San Diego, CA, USA, June 2-7, 2013
• Evidence for Self-organization in Borate Glasses, P. Boolchand, K. Vignarooban, M. Micoulaut, M. Malki and R. Kerner, Proceedings of the Glass and Optical Materials Division Annual Meeting, American Ceramic Society, St. Louis, MO, USA, May 20-24, 2012
• Boson Mode, Medium Range Structure and Intermediate Phase in (Na2O)x(B2O3)1-x Glasses, K. Vignarooban, P. Boolchand, M. Micoulaut and M. Malki, Bulletin of the APS, vol. 57 (1), APS March Meeting, Boston, MA, USA, February 27-March 2, 2012
• Vibrational Excitations and Elastic Phases in Sodium-Borate Glasses, K. Vignarooban, P. Boolchand and M. Micoulaut, Bulletin of the APS, vol. 56 (1), APS March Meeting, Dallas, TX, USA, March 21-25, 2011
• Intermediate Phase in Sodium Borate Glasses, P. Boolchand and K. Vignarooban, Proceedings of the Glass and Optical Materials Division Annual Meeting, American Ceramic Society, Corning, NY, USA, May 16-20, 2010
• On the Elastic Behavior of Sodium-Borate Glasses, K. Vignarooban, P. Boolchand, R. Kerner and M. Micoulaut,Bulletin of the APS, vol. 55 (2), APS March Meeting, Portland, OR, USA, March 15-19, 2010
• Characterization of Dry B2O3 Glass, K. Vignarooban, D. Novita, P. Chen and P. Boolchand, Bulletin of the APS, vol. 54(1), APS March Meeting, Pittsburgh, PA, USA, March 16-20, 2009
• Ceramic Filler (TiO2) and Plasticizer (EC) Together as Conductivity Enhancer in PEO9LiCF3SO3 Polymer Electrolyte,K. Vignarooban and M.A.K.L. Dissanayake, Proceedings of the National Conference on Advanced Materials for Emerging Technologies (NCAMET-2007), Peradeniya, Sri Lanka, July 21-22, 2007
• Poly (ethylene oxide) Based, Anion Conducting Solid Polymer Electrolytes for Possible Use in PEC Solar Cells, T.M.W.J. Bandara, M.A.K.L. Dissanayake, O.A. Illeperuma, K. Varaprathan and K. Vignarooban, Proceedings of the International Conference on Materials for Advanced Technologies (ICMAT), Singapore, July 1-6, 2007
• Thermal and Electrical Properties of PEO9LiTf + x wt% TiO2 + (15-x) wt% Al2O3 Nano-Composite Polymer Electrolyte Membranes, M.A.K.L. Dissanayake and K. Vignarooban, Proceedings of the 62nd Annual Sessions, Sri Lanka Association for the Advancement of Science (SLAAS), Colombo, Sri Lanka, December 10-15, 2006
• Plasticized and Plasticizer-Free, Nano-Composite Polymer Electrolytes for Rechargeable Li-ion Batteries, M.A.K.L. Dissanayake, H.M.J.C. Pitawala and K. Vignarooban, Proceedings of the 62nd Annual Sessions, Sri Lanka Association for the Advancement of Science (SLAAS), Colombo, Sri Lanka, December 10-15, 2006
• Thermal, Dielectric and Transport Properties of Plasticized and Plasticizer-Free, Nano-Composite Polymer Electrolytes for Lithium Batteries, H.M.J.C. Pitawala, K. Vignarooban, M.A.K.L. Dissanayake, V.A. Senaviratne, Proceedings of the 10th Anniversary Celebrations of the PGIS (Postgraduate Institute of Science), Peradeniya, Sri Lanka, April 28, 2006
• Effect of NiCl2 on the Ionic Conductivity and Thermal Properties of PEO9CuSCN Polymer Electrolyte System, K. Vignarooban and M.A.K.L. Dissanayake, Proceedings of the 15th International Conference on Solid State Ionics, Baden-Baden, Germany, July 17-22, 2005
• Annealing effect of CdS thin films prepared by chemical bath deposition method, K.Paramanathan, M.A.K.L.Dissanayake, G.K.R.Senadeera ,C.A.Thotawattage , K.Balashankar, P.Ravirajan. International conference on materials science and technology 2014, 13 –17 October 2014, PUSPIPTEK Serpong – Indonesia.
• Solid State Cadmium Selenide (CdSe) Quantum Dot Sensitized Solar Cells (QDSSCs) with a Hole Transporting Polymer, M. Thanihaichelvan, H.R. Chandan, G.R. Balakrishna, Jenny Nelson, P. Ravirajan, The 6th international conference on new and renewable energy-2015, Deagu, Korea., March 2015.
• Effect of Interface Modifiers in Hole Mobility in Hybrid Nanoporous TiO2/Polythiophene (P3HT) Solar Cells, K. Prashanthan, T. Thivakarasarma, K. Balashankar and P. Ravirajan, 15th International Conference on NANOTECHNOLOGY, 27 – 30 JULY 2015 | ROME (ITALY)
• Poly (Hexiletheopane) and Cadmium Sulfide sensitized solar cells based on nanoporous Titanium Dioxide (TiO2) layer, M.Thanihaichelvan, S.Karshini, K.Balasangar, P.Ravirajan*15th International Conference on NANOTECHNOLOGY, 27 – 30 JULY 2015 | ROME (ITALY).
• K. Prashanthan, T. Thivakarasarma, K. Balashangar, P. Ravirajan, M. Planells, N.Robertson and J. Nelson, Hole-Mobility Improvements In Hybrid Titanium Dioxide/Poly(3-Hexylthiophene) Nanocomposites By Employing Interface Modifiers, 5th International Conference on Functional Materials & Devices 2015 (ICFMD – 2015), 4 – 6 August  2015. Johor Bahru, Malaysia.
• S. Loheeswaran, K. Balashangar, and P. Ravirajan, Improvingthe Performance of Hybrid Titanium Dioxide (TiO2) / Polymer Solar Cell Using Interface Modifiers, 5th International Conference on Functional Materials & Devices 2015 (ICFMD – 2015), 4 – 6 August  2015. Johor Bahru, Malaysia.

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• S.Kukan and P. Ravirajan, 14th Annual Sessions of Jaffna Science Association, Jaffna, 26-28, April 2006 (14) 23. (ISSN 1800-1289)
• V. Manivarman and P. Ravirajan, 14th Annual Sessions of Jaffna Science Association, Jaffna, 26-28, April 2006 (14) 5. (ISSN 1800-1289)
• G. Gnanapiragasam, A. Thevakaran, S. Sivaraya and P. Ravirajan, 14th Annual Sessions of Jaffna Science Association, Jaffna, 26-28, April 2006 (14) 6. (ISSN 1800-1289)
• P. Ravirajanand J. Nelson, 14th Annual Sessions of Jaffna Science Association, Jaffna, 26-28, April 2006 (14) 8. (ISSN 1800-1289)
• K.Harithas, S.Sivaraya and P. Ravirajan 14th Annual Sessions of Jaffna Science Association, Jaffna, 26-28, April 2006 (14) 24. (ISSN 1800-1289).
• Utilisation of Plant Pigments in Dye-Sensitized Nanoporous TiO2 Solar Cells, T. Jaseetharan, S.Sarathchandran, K.Jeyakanthan, M.Senthilnanthanan, S.Sivaraya and P.Ravirajan, National Conference on Advanced Materials For Emerging Technologies (NCAMET 2007), Peradeniya, 21 – 22 July 2007.
• An investigation of electrical properties of Y-doped BaTiO3 ceramics with different: Mn additions, B.S.B. Karunaratne and P. Ravirajan, Proceedings of the 54th Annual Session of Sri Lankan Association for Advancement of Science, E1-42, 1999.
• Electrical Characterization of Cr substituted di-Iron Aresenides, N.Sivayogan, L.Ravishnkar,  P.Ravirajan, S.Sivaraya, National Conference on Advanced Materials For Emerging Technologies (NCAMET 2007), Peradeniya, 1 44(July 21-22, 2007).
• Enhancing the performance of Hybrid TiO2/polymer Solar Cells by replacing nanoporous TiO2 layer with Single Wall carbon Nanotube (SWNT): TiO2 blend, K. Balashangar, S. Sarathchandra and, P. Ravirajan, The First International Conference on Advanced Materials, Science and Engineering (ICAMSE ’12), Colombo.
• Electrical Conductivity Enhancement in PEO-Based Polymer Electrolytes Containing Mixed-Salts LiCF3SO3 and NiCl2,K. Vignarooban, M.A.K.L. Dissanayake and R.S.P. Bokalawela, Proceedings of the Peradeniya University Research Sessions, Peradeniya, Sri Lanka, Vol. 9, November 10, 2004
• Performance enhancement of nanocrystalline TiO2 / P3HT Hybrid solar cell via N719 dye interface modification, S. Loheeswaran, K. Balashangar , P. Ravirajan, HETC Symposium 2014, July 7 & 8, 2014 at Hotel Galadari, Colombo, Sri Lanka.

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