• Deep insight into structural and optoelectronic properties of mixed anion perovskites 

  Chapa Pamodani Wanniarachchi, W.A.; Eidsvåg, H.; Arunasalam, T.; Ravirajan, P.; Velauthapillai, D.; Vajeeston, P. (IOP Publishing Ltd, 2024)

  Here we present the optoelectronic properties of pure inorganic lead-free halide perovskites in the form of Cs2AgBiX6 (X=Br, Cl, F, I) using the density functional theory calculations on cubic phase (Fm 3̅m) and tetragonal ...
• Natural sensitizer extracted from Mussaenda erythrophylla for dye‑sensitized solar cell 

  Rajaramanan, T.; Gourji, F.H.; Elilan, Y.; Yohi, S.; Senthilnanthanan, M.; Ravirajan, P.; Velauthapillai, D. (Springer Nature, 2023)

  In this study, a natural dye from the flowers of Mussaenda erythrophylla extracted separately in ethanol and de-ionized water was employed as a photosensitizer in DSSCs. The quantitative phytochemical analyses were ...
• Resistance to the larvicide temephos and altered egg and larval surfaces characterize salinity‑tolerant Aedes aegypti 

  Sivabalakrishnan, K.; Thanihaichelvan, M.; Tharsan, A.; Eswaramohan, T.; Ravirajan, P.; Hemphill, A.; Ramasamy, R.; Surendran, S.N. (Springer Nature, 2023)

  Aedes aegypti, the principal global vector of arboviral diseases and previously considered to oviposit and undergo preimaginal development only in fresh water, has recently been shown to be capable of developing in coastal ...
• Iodine-free acetonitrile-modified BmimI ionic liquid electrolyte with in-situ triiodide formation for efficient dye-sensitized solar cells 

  Rajaramanan, T.; Gourji, F.H.; Zhao, Y.; Senthilnanthanan, M.; Ravirajan, P.; Velauthapillai, D. (Springer, 2026)

  In this study, an iodine-free 1-butyl-3-methylimidazolium iodide (BmimI) ionic liquid, modified with acetonitrile (AN), was employed as a redox mediator using a facile approach to enhance DSSC performance. The optical ...
• A facile impregnation synthesis of Ni-doped TiO2 nanomaterials for dye-sensitized solar cells 

  Rajaramanan, T.; Velauthapilla, D.; Ravirajan, P.; Senthilnanthanan, M. (Springer, 2023)

  This study reports a facile impregnation method for synthesizing Ni-doped TiO2 nanomaterials using P25-TiO2 as a starting material. The as prepared nanomaterials were subjected to structural and optical characterizations ...
• Eco-friendly Egyptian blue (CaCuSi4O10) dye for luminescent solar concentrator applications 

  Rajaramanan, T.; Keykhaei, M.; Gourji, F.H.; Ravirajan, P.; Senthilnanthanan, M.; Frette, O.; Velauthapillai, D. (The Royal Society of Chemistry, 2023)

  This study focuses on synthesizing the heavy metal-free ancient Egyptian blue (EB; CaCuSi4O10) dye using a facile ceramic method for luminescent solar concentrator (LSC) application. XRD, SEM and EDX results confirmed ...
• Enhanced solar energy harvest in dye-sensitized solar cells using silver-doped TiO2 Photoelectrodes via Spray Pyrolysis 

  Sritharan, P.; Senthilnanthanan, M.; Ravirajan, P.; Velauthapillai, D.; Asoka Kumara, G.R.; Palanisamy, B. (Elsevier, 2025)

  This study focuses on doping TiO2 with trace amounts of Ag⁺ ions, employing spray pyrolysis to prepare the Agdoped TiO2 photoelectrode for application in Dye-Sensitized Solar Cells (DSSCs). In this regard, Ag-doped ...
• Active carbon derived from rice husk as sustainable substitutes for costly platinum electrodes in dye-sensitized solar cells 

  Weerasinghe, M.I.U.; Kumarage, P.M.L.; Amarathunga, I.G.K.D.; Bandara, T.M.W.J.; Velauthapillai, D.; Karunarathne, B.C.; Ravirajan, P.; Rajapakse, R.M.G.; Kumara, G.R.A. (Elsevier, 2024)

  Significant financial and environmental challenges are associated with using platinum electrodes as counter electrodes (CEs) in dye-sensitized solar cells (DSCs). This work uses rice husk, an agricultural waste, to ...
• Potential transition and post-transition metal sulfides as efficient electrodes for energy storage applications: review 

  Kajana, T.; Pirashanthan, A.; Velauthapillai, D.; Yuvapragasam, A.; Shivatharsiny, Y.; Ravirajan, P.; Senthilnanthanan, M. (The Royal Society of Chemistry, 2022)

  Electrochemical energy storage has attracted much attention due to the common recognition of sustainable energy development. Transition metal sulfides and post-transition metal sulfides have been intensively been focused ...
• Hybrid Functional Study on Electronic and Optical Properties of the Dopants in Anatase TiO2 

  Chapa Pamodani Wanniarachchi, W.A.; Arunasalam, T.; Ravirajan, P.; Velauthapillai, D.; Vajeeston, P. (American Chemical Society, 2023)

  TiO2 was known as a golden heterogeneous photocatalyst due to its chemical stability, low cost, nontoxicity, and strong oxidizing power. However, anatase TiO2 predominantly absorbs the photon energy in the ultraviolet ...
• Low-Cost Perovskite Solar Cell Fabricated using the Expanded Graphite Back Contact and Electronically Conducting Activated Carbon as the Hole Transporting Material 

  Karunarathne, B.C.; Dunuweera, S.P.; Medagedara, A.T.; Velauthapillai, D.; Ravirajan, P.; Unil Perera, A.G.; Ajith DeSilva, L.; Tennakone, K.; Gamini Rajapakse, R.M.; Asoka Kumara, G.R. (American Chemical Society, 2023)

  Although perovskite solar cells (PSCs) have reached a record high conversion efficiency of 25.7%, the materials used to fabricate them invoke costly hole-transporting materials, such as spiro-OMeTAD, and expensive gold ...
• Well-Separated Photoinduced Charge Carriers on Hydrogen Production Using NiS2/TiO2 Nanocomposites 

  Shanmugaratnam, S.; Ravirajan, P.; Shivatharsiny, Y.; Velauthapillai, D. (American Chemical Society, 2023)

  Photocatalytic hydrogen production is a sustainable and greenhouse-gas-free method that requires an efficient and abundant photocatalyst, which minimizes energy consumption. Currently, interests in transition metal ...
• Green hydrogen production through photocatalytic seawater splitting on MS2/TiO2 (M=Ni/Co/Sn) nanocomposites over simulated solar irradiation 

  Shanmugaratnam, S.; Ravirajan, P.; Shivatharsiny, Y.; Velauthapillai, D. (Elsevier, 2024)

  Green hydrogen will play an important role in reducing carbon emission in sectors like transportation, power supply, and industry. However, for it to become competitive technology, the costs related to hydrogen production must ...
• Optical transmission and photoconductivity of chemical bath-deposited CdS thin films for optoelectronic applications 

  Dissanayake, M.A.K.L.; Paramanathan, K.; Senadeera, G.K.R.; Thotawattage, C.A.; Balashangar, K.; Ravirajan, P.; Dassanayake, B.S. (Elsevier, 2024)

  This paper presents a comprehensive study of the optical transmission, photoconductivity, and morphology of CdS thin films deposited via the chemical bath deposition (CBD) method. The films deposited for 60 min exhibit an ...
• Computing harmonic-measure distribution functions of some multiply connected unbounded planar domains 

  Arunmaran, M. (Elsevier, 2025)

  A Brownian particle released from a point z0in a two-dimensional region Ωwill move around randomly until it eventually hits the boundary of Ω. We are interested in the probability that it hits the boundary somewhere within ...
• Harmonic-measure distribution functions of multiply connected domains with various geometries 

  Green, C.C.; Arunmaran, M.; Ward, L.A. (The Royal Society, 2025)

  The harmonic-measure distribution functions, or h-functions, associated with several classes of planar multiply connected domains Ω ⊂C and basepoint z0 ∈Ω locations are the principal objects of consideration in this ...
• Palmyrah Seed-Derived Activated Charcoal/TiO₂ Composites as a Counter Electrode for Dye-Sensitized Solar Cells 

  Rajaramanan, T.; Umayangani Weerasinghe, M.I.; Kumara, G.R.A.; Senthilnanthanan, M.; Ravirajan, P.; Velauthapillai, D. (American Chemical Society (ACS), 2025)

  Platinum (Pt) is a widely used counter electrode (CE) material in dye-sensitized solar cells (DSSCs) due to its excellent catalytic properties. However, the steep cost limits its widespread adoption. This has spurred ...
• MS2/TiO2 (M = Co, Sn and Ni) electrodes for electrocatalytic and photocatalytic water splitting 

  Shanmugaratnam, S.; Srinivasan, S.; Yuvakkumar, R.; Oltedal, V.M.; Ravirajan, P.; Shivatharsiny, Y.; Velauthapillai, D. (Elsevier, 2025)

  Exploring an efficient and stable nanocatalyst for water splitting is a highly desirable, but still a challenging goal. Herein, we synthesized different metalchalcogenides (MS2: M = Co, Ni, Sn) embedded with TiO2 that ...
• Mitigation of Self-p-Doping and Off-Centering Effect in Tin Perovskite via Strontium Doping 

  Frasca, C.; Alippi, P.; Schwiddessen, R.; Prashanthan, K.; Nasti, G.; Zuo, S.; Ur Rehman, M.O.; Aldamasy, M.H.; Hartono, N.T.P.; Musiienko, A.; Abate, A. (American Chemical Society, 2025)

  Tin-based perovskite solar cells offer a less toxic alternative to their lead-based counterparts. Despite their promising optoelectronic properties, their performances still lag behind, with the highest power conversion ...
• Tailored Crystallization Dynamics for Efficient and Stable DMSO-Free Tin Perovskite Solar Cells 

  Zuo, S.; Tarasov, A.; Frohloff, L.; Prashanthan, K.; Ruske, F.; Lounasvuori, M.; Frasca, C.; Dallmann, A.; Zu, F.; Mathies, F.; Scheler, F.; Hartono, N.T.P.; Guixiang, L.; Jinzhao, L.; Simmonds, M.; Wenhui, L.; Koch, N.; Albrecht, S.; Meng, L.; Unger, E.; Aldanmasy, M.H.; Musiienko, A.; Abate, A. (Wiley-VCH GmbH, 2025)

  Tin perovskite solar cells are emerging as a sustainable lead-free alternative in thin film photovoltaics. DMSO-free processed tin perovskites are gaining interest due to the detrimental effects of DMSO on tin oxidation. ...

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