Novel Photovoltaic Absorber Materials
Silicon is a universal well-known PV absorber used in currently commercialized solar panels show superior efficiencies (27.6%). But, the cost and material utilization of silicon solar cells are quite high. To resolve this issue, thin film absorbers which have ~1/100th material usage than that of Si gained research interest and materials like CuInS2, CdTe, CuInxGa1-xSe2 (CIGS), Cu2ZnSn(SxSe1-x)4 CZTS are discovered. Among the materials, synthesis of materials having direct bandgap of 1.0 – 1.5 eV with low cost, earth abundant constituents can pitch a material towards marketability in the PV sector. I have research experience on materials like CZTS, CIGS etc. through both vacuum and non-vacuum routes. At present, I am working on the synthesis and fabrication of chalcogenide perovskites like BaZrS3 for Photovoltaic applications.
High Entropy Materials
Utilization of ecofriendly materials that can aid in the breakdown of industrial wastes, which are destroying the ecosystem will be my ancillary research area. High-entropy oxides and sulfides are emerging classes of materials in which five or more metal cations are mixed in near-equimolar ratios and stabilized by high configurational entropy. HEOs, first reported in 2015, typically adopt structures like rock-salt, perovskite, spinel, or fluorite and are valued for their chemical stability, tunable electrical properties, and catalytic activity, making them useful in batteries, fuel cells, and catalysis. HESs, on the other hand, use sulfide anions (S²⁻) instead of oxides, generally offering higher electrical conductivity and stronger catalytic performance, especially for hydrogen evolution and energy storage. While HEOs are more stable under harsh conditions, HESs provide superior electronic properties, and both are actively studied for advanced energy conversion and storage applications. Presently, I am working on the synthesis of phase pure high entropy oxides and utilization of such materials towards photocatalytic applications.