Browsing HVL Open by Author "Ravirajan, Punniamoorthy"
Now showing items 1-18 of 18
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Air processed Cs<inf>2</inf>AgBiBr<inf>6</inf> lead-free double perovskite high-mobility thin-film field-effect transistors
Abiram, Gnanasampanthan; Gourji, Fatemeh Heidari; Pitchaiya, Selvakumar; Ravirajan, Punniamoorthy; Murugathas, Thanihaichelvan; Velauthapillai, Dhayalan (Peer reviewed; Journal article, 2022)This study focuses on the fabrication and characterization of Cs2AgBiBr6 double perovskite thin film for field-effect transistor (FET) applications. The Cs2AgBiBr6 thin films were fabricated using a solution process technique ... -
Bimetallic AC/Ag2CrO4/SnS heterostructure photoanode for energy conversion and storage: A self-powered Photocapacitor
Kajana, Thirunavukarasu; Pirashanthan, Arumugam; Yuvapragasam, Akila; Velauthapillai, Dhayalan; Ravirajan, Punniamoorthy; Senthilnanthanan, Meena (Peer reviewed; Journal article, 2021)The worldwide increase in generation of solar based electricity prompts the essentiality of research efforts on the development of energy storage systems. In this regard, self-powered photocapacitors are of keen interest ... -
CoS2/TiO2 Nanocomposites for Hydrogen Production under UV Irradiation
Shanmugaratnam, Sivagowri; Velauthapillai, Dhayalan; Ravirajan, Punniamoorthy; Christy, Alfred Antony; Shivatharsiny, Yohi (Journal article; Peer reviewed, 2019)Transition metal chalcogenides have intensively focused on photocatalytic hydrogen production for a decade due to their stronger edge and the quantum confinement effect. This work mainly focuses on synthesis and hydrogen ... -
Cost Effective Solvothermal Method to Synthesize Zn-Doped TiO2 Nanomaterials for Photovoltaic and Photocatalytic Degradation Applications
Rajaramanan, Tharmakularasa; Shanmugaratnam, Sivagowri; Gurunanthanan, Vijayakumar; Shivatharsiny, Yohi; Velauthapillai, Dhayalan; Ravirajan, Punniamoorthy; Senthilnanthanan, Meena (Peer reviewed; Journal article, 2021)Titanium dioxide (TiO2) is a commonly used wide bandgap semiconductor material for energy and environmental applications. Although it is a promising candidate for photovoltaic and photocatalytic applications, its overall ... -
Eco-friendly Egyptian blue (CaCuSi<inf>4</inf>O<inf>10</inf>) dye for luminescent solar concentrator applications
Rajaramanan, Tharmakularasa; Keykhaei, Mansoureh; Gourji, Fatemeh Heidari; Ravirajan, Punniamoorthy; Senthilnanthanan, Meena; Frette, Øyvind; Velauthapillai, Dhayalan (Peer reviewed; Journal article, 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 that ... -
Enhanced Photovoltaic Properties of Dye-Sensitized Solar Cells through Ammonium Hydroxide-Modified (Nitrogen-Doped) Titania Photoanodes
Rajaramanan, Tharmakularasa; Fatemeh, Heidari Gourji; Velauthapillai, Dhayalan; Ravirajan, Punniamoorthy; Meena, S (Peer reviewed; Journal article, 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. ... -
A facile impregnation synthesis of Ni-doped TiO2 nanomaterials for dye-sensitized solar cells
Rajaramanan, Tharmakularasa; Velauthapillai, Dhayalan; Ravirajan, Punniamoorthy; Senthilnanthanan, Meena (Peer reviewed; Journal article, 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 ... -
Lithium doped poly(3-hexylthiophene) for efficient hole transporter and sensitizer in metal free quaterthiophene dye treated hybrid solar cells
Pirashanthan, Arumugam; Velauthapillai, Dhayalan; Robertson, Neil; Ravirajan, Punniamoorthy (Peer reviewed; Journal article, 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 ... -
Low-Cost Perovskite Solar Cell Fabricated using the Expanded Graphite Back Contact and Electronically Conducting Activated Carbon as the Hole Transporting Material
Buddhika, Karunarathne; Dunuweera, S P; Medagedera, A T; Velauthapillai, Dhayalan; Ravirajan, Punniamoorthy; Tennakone, Keerthi; Perera, U G; de Slva, Ajith; Rajapakse, R.M.G.; Kumara, G.R.A (Peer reviewed; Journal article, 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 ... -
Natural sensitizer extracted from Mussaenda erythrophylla for dye-sensitized solar cell
Rajaramanan, Tharmakularasa; Gourji, Fatemeh Heidari; Elilan, Yogenthiran; Yohi, Shivatharsiny; Senthilnanthanan, Meena; Ravirajan, Punniamoorthy; Velauthapillai, Dhayalan (Peer reviewed; Journal article, 2023)In this study, a natural dye from the fowers of Mussaenda erythrophylla extracted separately in ethanol and de-ionized water was employed as a photosensitizer in DSSCs. The quantitative phytochemical analyses were performed ... -
Potential transition and post-transition metal sulfides as efficient electrodes for energy storage applications: review
Thirunavukkarasu, Kajana; Pirashanthan, Arumugam; Velauthapillai, Dhayalan; Yuvapragasam, Akila; Yohi, Shivatharsiny; Ravirajan, Punniamoorthy; Senthilnanthanan, Meena (Peer reviewed; Journal article, 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 ... -
Recent progress and approaches on transition metal chalcogenides for hydrogen production
Shanmugaratnam, Sivagowri; Yogenthiran, Elilan; Koodali, R; Ravirajan, Punniamoorthy; Velauthapillai, Dhayalan; Shivatharsiny, Yohi (Peer reviewed; Journal article, 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 ... -
Review on Perovskite Semiconductor Field–Effect Transistors and Their Applications
Abiram, Gnanasampanthan; Thanihaichelvan, Murugathas; Ravirajan, Punniamoorthy; Velauthapillai, Dhayalan (Peer reviewed; Journal article, 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. However, the use of the perovskite ... -
Roles of Interfacial Modifiers in Inorganic Titania/Organic Poly(3-hexylthiophene) Heterojunction Hybrid Solar Cells
Pirashanthan, Arumugam; Kajana, Thirunavukarasu; Velauthapillai, Dhayalan; Shivatharsiny, Yohi; Bentouba, Said; Ravirajan, Punniamoorthy (Peer reviewed; Journal article, 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 efficiencies ... -
Ruthenium (Ru) Doped Titanium Dioxide (P25) electrode for dye sensitized solar cells
Rajaramanan, Tharmakularasa; Natarajan, Muthukumarasamy; Ravirajan, Punniamoorthy; Senthilnanthanan, Meena; Velauthapillai, Dhayalan (Peer reviewed; Journal article, 2020)In this study, P25-titanium dioxide (TiO2) was doped with ruthenium (Ru) by systematically varying the Ru content at 0.15, 0.30, 0.45 and 0.6 mol%. The synthesized Ru-doped TiO2 nanomaterials have been characterized by ... -
SnS2/TiO2 Nanocomposites for Hydrogen Production and Photodegradation under Extended Solar Irradiation
Shanmugaratnam, Sivagowri; Selvaratnam, B; Baride, Aravind; Koodali, R; Ravirajan, Punniamoorthy; Velauthapillai, Dhayalan; Shivatharsiny, Yohi (Peer reviewed; Journal article, 2021)Earth–abundant transition metal chalcogenide materials are of great research interest for energy production and environmental remediation, as they exhibit better photocatalytic activity due to their suitable electronic and ... -
Thermally Evaporated Copper Iodide Hole-Transporter for Stable CdS/CdTe Thin-Film Solar Cells
Thivakarasarma, Thuraisamykurukkal; Lakmal, Adikari Arachchige Isuru; Dassanayake, Buddhika Senarath; Velauthapillai, Dhayalan; Ravirajan, Punniamoorthy (Peer reviewed; Journal article, 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 cells ... -
Well-Separated Photoinduced Charge Carriers on Hydrogen Production Using NiS<inf>2</inf>/TiO<inf>2</inf> Nanocomposites
Shanmugaratnam, Sivagowri; Ravirajan, Punniamoorthy; Yohi, Shivatharsiny; Velauthapillai, Dhayalan (Peer reviewed; Journal article, 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 ...