A5036204985- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Copper-based nanomaterials and applications
- Perovskite Materials and Applications
- Graphene research and applications
- Semiconductor materials and interfaces
- Carbon Nanotubes in Composites
- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- ZnO doping and properties
- Machine Learning in Materials Science
- Electrocatalysts for Energy Conversion
- Magnetic Properties and Synthesis of Ferrites
- Crystal Structures and Properties
- Advanced battery technologies research
- Solid-state spectroscopy and crystallography
- Graphene and Nanomaterials Applications
- Molten salt chemistry and electrochemical processes
- Magneto-Optical Properties and Applications
- Manufacturing Process and Optimization
- Chemical and Physical Properties of Materials
- Solar Thermal and Photovoltaic Systems
- Iron oxide chemistry and applications
- Electrodeposition and Electroless Coatings
- solar cell performance optimization
International Advanced Research Centre for Powder Metallurgy and New Materials
2013-2023
Tallinn University of Technology
2022-2023
Indian Institute of Technology Hyderabad
2013-2019
A cost-effective dopant-free fluorene-based enamine as a hole transport material for semi-transparent Sb 2 S 3 solar cells is successfully demonstrated.
Fluorene-based hole transport materials (HTMs) with terminating thiophene units are explored, for the first time, antimony sulfide (Sb2S3) solar cells. These HTMs possess largely simplified synthesis processes and high yields compared to conventional expensive conductors making them reasonably economical. The unit-linked have been successfully demonstrated in ultrasonic spray-deposited Sb2S3 cells resulting efficiencies range of 4.7-4.9% an average visible transmittance (AVT) 30-33% (400-800...
Abstract Nanostructured transition metal oxide synthesis possessing high energy density and stability is desirable for supercapacitors. Herein, we synthesize three‐dimensional NiCo 2 O 4 (NCO) nanosheets with oxygen vacancies induced by sustainable environmentally benign electrodeposition assisted chemical reduction process. Oxygen increase the conductivity, adsorptivity, active surface area, thereby enhancing charge storage capabilities. The binder‐free NCO delivers highest specific...
The rapidly expanding demand for photovoltaics (PVs) requires stable, quick, and easy to manufacture solar cells based on socioeconomically ecologically viable earth-abundant resources. Sb2S3 has been a potential candidate PVs the efficiency of planar thin-film witnessed reasonable rise from 5.77% in 2014 8% 2022. Herein, aim is bring new insight into cell research by investigating how bulk surface properties absorber current-voltage deep-level defect characteristics these films are affected...
Copper indium diselenide (CuInSe2) films have been prepared by pulse electrodeposition technique on Molybdenum substrate followed post-deposition annealing at 550°C. Optimization of parameters varying the duration (duty cycle) in order to achieve high quality has reported. Appropriate manipulation resulted a novel flake-like crystallite morphology and better control over composition individual elements. The CIS thin were comprehensively characterized using SEM-EDS, FIB, XRD UV-DRS study...
Polycrystalline CdS thin films comprising of hexagonal crystal structure are successfully fabricated by pulse electrodeposition using a two-electrode system at room temperature. The method utilizes tartaric acid as complexing agent for the first time that minimizes formation colloidal sulfur while optimizing deposition potential and avoids conventional post-deposition heat-treatment step. Additionally, is varied to obtain desired thickness suitable application in solar cells. Pulse...
Solar cells based on polycrystalline Cu(In,Ga)Se2 absorber layers have yielded the highest conversion efficiency among all thin-film technologies. CIGS thin-films possess large optical absorption coefficient (≈105 cm−1) and a suitable bandgap of ≈ 1.20 eV for an ideal stoichiometry CuIn0.7Ga0.3Se2. In present study, Direct Current (DC) Pulsed (PC) electrodeposition techniques are employed to obtain near stoichiometric Mo foil using two electrode system at constant potential. Deposited films...
Cu(In,Ga)Se2 (CIGS) materials are one of the most promising solar cell technologies owing to their large absorption coefficient and tunable direct bandgap, they have gained considerable commercial maturity. The study herein puts forward preparation nanostructured CIGS films containing branched nanorod architectures, which is reported for first time. process employs an economic pulse-reverse electrodeposition technique by utilizing fundamentals electro-reduction oxidation fabricate completely...
Cu In Se2 thin films are very important semiconductor material for solar cell applications because of chemical stability, direct band gap and high optical absorption coefficient. this work, these have been prepared by using different deposition techniques such as electrodeposition, solvothermal, vacuum evaporation, hydrothermal pulsed electrode position technique. were fully characterized field emission scanning electron microscopy, X-ray diffraction, Energy dispersive analysis, atomic force...
Antimony sulfide (Sb2S3) with bandgap of ca. 1.7 eV is a promising absorber material for indoor and semi-transparent photovoltaic devices. However, the high cost commonly used hole transport materials (HTMs) may impede advancement this technology. In study, dopant-free fluorene-based enamines different aliphatic chain length synthesized by simple chemical method are first time as HTMs in Sb2S3 solar cell. The study investigates impact HTM type layer thickness on performance cells. cells...
CuInGaSe2 (CIGS) based compound semiconductors are among the leading materials for photovoltaic applications. Pulsed current electrochemical deposition is employed in this study to fabricate CIGS films wherein carried out from an electrolyte consisting chlorides of copper, indium, gallium and selenous acid at a pH around 2.2. The process also uses trisodium citrate which plays role complexing agent aids narrowing reduction potentials elements thereby easing optimization obtain desired...
Abstract Electrodeposition is one of the leading non-vacuum techniques for fabrication CuInSe 2 (CIS)-based solar cells. In present work, pulse electrodeposition, an advanced technique, utilized effectively CIS absorber preparation devoid any additives/complexing agents. An economic electrodeposition employed deposition Cu/In stack followed by selenization to fabricate absorbers on flexible and glass substrates. The approach uses a two-electrode system suitable large area utilizes...