Physics: Recent submissions

Now showing items 1-20 of 174

Polymer-Assisted Crystallization and Defect Passivation in Planar Wide-Bandgap FAPbBr3 Perovskite Solar Cells

Amalraj, P.A.; Loheeswaran, S.; Landova, L.; Neykova, N.; Holovský, J. (American Chemical Society, 2025)

Wide-bandgap lead bromide perovskites such as FAPbBr 3 are promising candidates for tandem solar cells and high-voltage optoelectronic applications, yet their performance is limited by surface and bulk defects that induce ...
Nickel oxide hole transport layer for perovskite solar cells: Preparation via pulsed laser deposition with simulation and experimental insights

Amalraj, P.A.; Horynova, E.; Holovsky, J.; Landova, L.; Jain, N.; Pakki, A.D.; Kuo, M.H.; Pelikánová, I.B,; Dzurňák, B.; Horák, L.; Pop-Georgievski, O.; Neda, N. (Elsevier, 2025)

Nickel oxide (NiOx) has gained attention as a promising inorganic hole transport layer for perovskite solar cells due to its wide bandgap, high transparency, and stability. However, tuning of band alignment by an extra ...
Synergetic effect of tetraoctylammonium chloride in suppressing photoinduced phase segregation in mixed halide perovskite solar cells

Amalraj, P.A.; Rajavinayagam, A.; Landova, L.; Dopita, M.; Holovsky, J. (Elsevier, 2025)

Phase segregation, caused by halide ion migration under illumination, is a critical challenge limiting the commercialization of mixed-halide perovskites. In this study, a facile and effective strategy is introduced ...
Air processed Cs2AgBiBr6 lead‑free double perovskite high‑mobility thin‑flm feld‑efect transistors

Abiram, G.; HeidariGourji, F.; Pitchaiya, S.; Ravirajan, P.; Murugathas, T.; Velauthapillai, D. (Scientifc Reports, 2022)

This study focuses on the fabrication and characterization of Cs2AgBiBr6 double perovskite thin flm for feld-efect transistor (FET) applications. The Cs2AgBiBr6 thin flms were fabricated using a solution process technique ...
Synthesis of a carboxylic acid-based ruthenium sensitizerand its applicability towards Dye-Sensitized Solar Cells

Pirashanthan, A.; Thanihaichelvan, M.; Mariappan, K.; Velauthapillai, D.; Ravirajan, P.; Shivatharsiny, Y. (Elsevier, 2021)

This work reports the synthesis of ruthenium based Ru(bpy) (dcbpy)(ClO ) [(bpy)2,2′-bipyridine;dcbpy = 4,4′-dicarboxy-2,2′-bipyridine] (RuC) dye and its application in solid andliquid state Dye-Sensitized Solar Cells ...
Structural and photoelectrochemical characterization of heterostructuredcarbon sheet/Ag MoO -SnS/Pt photocapacitor

Kajana, T.; Velauthapilla, D.; Shivatharsiny, Y.; Ravirajan, P.; Yuvapragasam, A.; Senthilnanthanan, M. (Elsevier, 2020)

Photocapacitors can harvest solar energy and store it in the form of electrical energy and are expected to solve theproblem of unstable power output of solar cells under fluctuating sunlight. In the present study, a ...
Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

Pitchaiya, S.; Eswaramoorthy, N.; Natarajan, M.; Santhanam, A.; Asokan, V.; Ramakrishnan, V.M.; Rangasamy, B.; Sundaram, S.; Ravirajan, P.; Velauthapillai, D. (Scientific Reports, 2020)

Perovskite solar cells (PSCs) composed of organic polymer-based hole-transporting materials (HTMs) are considered to be an important strategy in improving the device performance, to compete with conventional solar cells. ...
Enhanced Performance of Nanoporous Titanium Dioxide Solar Cells Using Cadmium Sulfide and Poly(3-hexylthiophene) Co-Sensitizers

Thanihaichelvan, M.; Sri Kodikara, M.M.P.; Ravirajan, P.; Velauthapillai, D. (Polymers, 2017)

This work reports the effect of co-sensitization of nanoporous titanium dioxide using Cadmium Sulfide (CdS) and poly(3-hexylthiophene) (P3HT) on the performance of hybrid solar cells. CdS nanolayer with different thicknesses ...
Lithium doped poly(3‑hexylthiophene) for efficient hole transporter and sensitizer in metal free quaterthiophene dye treated hybrid solar cells

Pirashanthan, A.; Dhayalan, V.; Robertson, N.; Ravirajan, P. (Scientific Reports, 2021)

This work focuses on the role of Lithium doped Poly(3-hexylthiophene)(P3HT) in metal-free quaterthiophene (4T) dye treated Titanium dioxide ( TiO2) based hybrid solar cells. The dye treated hybrid solar cells with Lithium ...
Enhanced Photovoltaic Properties of Dye-Sensitized Solar Cells through Ammonium Hydroxide-Modified (Nitrogen-Doped) Titania Photoanodes

Rajaramanan, T.; Gourji, F.H.; Dhayalan, V.; Ravirajan, P.; Meena, S. (Hindawi, 2023)

Doping is a unique strategy to modulate the optical and electronic properties of semiconducting materials. This study reports a facile approach to fabricate nitrogen-doped TiO2 (N-doped TiO2) photoanode for DSSC application. ...
Solar Energy for sustainable development in developing countries

Ravirajan, P. (2017)

Sustainable development is the important gift that we can leave for our future generations. It is of vital importance to develop different types of renewable energy sources including solar, wind, hydro, biomass, geothermal ...
Recent Progress and Approaches on Transition Metal Chalcogenides for Hydrogen Production

Shanmugaratnam, S.; Yogenthiran, E.; Koodali, R.; Ravirajan, P.; Velauthapillai, D.; Shivatharsiny, Y. (Energies, 2021)

Development of efficient and affordable photocatalysts is of great significance for energy production and environmental sustainability. Transition metal chalcogenides (TMCs) with particle sizes in the 1–100 nm have been ...
Polymer/Fullerene Blend Solar Cells with Cadmium Sulfide Thin Filmas an Alternative Hole-Blocking Layer

Thanihaichelvan, M.; Loheeswaran, S.; Balashangar, K.; Velauthapillai, D.; Ravirajan, P. (Polymers, 2019)

In this work, chemical bath-deposited cadmium sulfide (CdS) thin films were employed as an alternative hole-blocking layer for inverted poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) bulk ...
Natural dyes extracted from Catharanthus flower petals for dye-sensitized solar cells application

Senevirathna, H.M.C.U.; Rajaramanan, T.; Velauthapillai, D.; Ravirajan, P. (University of Jaffna, 2022)

Dye-Sensitized Solar Cells (DSSCs) are one of the most studied cost-efficient solar cells with commercially available Ru-based dyes as the photosensitizer[1]. There has been a considerable interest to utilise natural ...
Cs2AgBiBr6 as a mixed anion perovskites for photovoltaic applications: A first-principle study

Wanniarachchi, C.P.; Eidsvåg, W.A.; Arunasalam, T.; Ravirajan, P.; Velauthapillai, D.; Vajeeston, P. (Elsevier, 2022)

Ab initio calculations were performed for cubic Fm-3 m (225) and tetragonal (I4/m) phases for Cs2AgBiBr6(CaB2). We used the Vienna Ab Initio Simulation Package (VASP) to calculate the ground state properties using two ...
Thermally Evaporated Copper Iodide Hole-Transporter for Stable CdS/CdTe Thin-Film Solar Cells

Thivakarasarma, T.; Isuru Lakmal, A.A.; Dassanayake, B.S.; Velauthapillai, D.; Ravirajan, P. (MDPI, 2022)

This study focuses on fabricating efficient CdS/CdTe thin-film solar cells with thermally evaporated cuprous iodide (CuI) as hole-transporting material (HTM) by replacing Cu back contact in conventional CdS/CdTe solar ...
Roles of Interfacial Modifiers in Inorganic Titania/Organic Poly(3-hexylthiophene) Heterojunction Hybrid Solar Cells

Pirashanthan, A.; Kajana, T.; Velauthapillai, D.; Yohi, S.; Bentouba, S.; Ravirajan, P. (MDPI, 2022)

Hybrid Titanium dioxide/Poly(3-hexylthiophene) heterojunction solar cells have gained research interest as they have the potential to become cost-effective solar technology in the future. Limited power conversion ...
Review on Perovskite Semiconductor Field–Effect Transistors and Their Applications

Abiram, G.; Thanihaichelvan, M.; Ravirajan, P.; Velauthapillai, D. (MDPI, 2022)

Perovskite materials are considered as the most alluring successor to the conventional semiconductor materials to fabricate solar cells, light emitting diodes and electronic displays. How ever, the use of the perovskite ...
Potential transition and post-transition metal sulfides as efficient electrodes for energy storage applications: review

Kajana, T.; Pirashanthan, A.; Velauthapillai, D.; Yuvapragasam, A.; Yohi, S.; Ravirajan, P.; Senthilnanthanan, M. (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 ...
Machine Learning Approach Regarding the Classification and Prediction of Dog Sounds: A Case Study of South Indian Breeds

Mohandas, P.; Anni, J.S.; Hasikin, K.; Velauthapillai, D.; Raj, V.; Murugathas, T.; Azizan, M.M.; Thanasekaran, R. (MDPI, 2022)

Barking is a form of vocal communication made by dogs. Each type of bark made by dogs has a distinct context. The classification of dog bark pattern will aid in the understanding of barking action. In this study, a machine ...

Now showing items 1-20 of 174

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