Pawan K. Khanna
Defence Institute of Advanced Technology (DIAT), India
Title: Application of cyclohexeno-1, 2, 3-selenadiazole via extrusion of selenium in synthesis of copper indium diselenide
Biography
Biography: Pawan K. Khanna
Abstract
Cyclohexeno-1,2,3-Selenadiazole is an organo-selenium compound and technologically important precursor. Organo-chalcogens particularly organo-selenium compounds have many useful applications in organic synthesis and pharmaceuticals. C-Se-N containing heterocycles can be exploited for their further use due to possible extrusion of Se by elimination of N2 molecules. 1,2,3-selenadiazole was utilized as precursor for synthesis of CuInSe2 (CISe) nanoparticles of various shape and size via thermal extrusion of selenium from cyclohexeno-1, 2, 3-selenadiazole (SDZ). The advantage of SDZ as a selenium precursor lies in its less stability towards thermal treatment leading to easy release of selenium at moderate temperature. The change in reaction temperature during synthesis of CISe exhibited change in physical properties of the CISe nanoparticles. The reactions performed at various temperatures showed variation in shape and size of the CISe nanoparticles which was confirmed by XRD, particle size analyzer, SEM and TEM analysis. Optical studies showed band gap in the range of 1.1-1.7 eV. Variety of shapes with lattice spacing of 0.33 nm corresponding to (112) crystal plane of CISe were confirmed from HRTEM analysis.
