2020/01/08 by B. Sudarshan Acharya, Acharya, B. Sudarshan, Albin Antony +22
Engineering · Physics and Astronomy · Materials Science · #Chalcogenide Semiconductor Thin Films #Spectroscopy and Quantum Chemical Studies #Quantum Dots Synthesis And Properties
paper · pdf · doi:10.48550/arxiv.2001.02457
We propose a low-cost approach for the synthesis of multifunctional CuSnS3\n(CTS) ternary compound thin film via spray pyrolysis technique. By varying Sn\nand S doping concentrations, a high energy absorber layers of CuSnS3 thin films\nwere deposited on a glass substrate at a substrate temperature of 405 C. The\nprepared samples were analysed with respect to their optical, structural and\nelectrical and nonlinear optical properties. X-Ray diffraction (XRD) analysis\nreveals that the films exhibit a tetragonal crystal structure with a\npreferential growth orientation along (1 1 2). The surface morphology of the\nfilms was explored by atomic force microscopy (AFM) in tapping mode\nconfiguration. Variation in the carrier charge density and electrical\nproperties were observed for different Sn and S combination. The analysis of\nthe Raman spectra indicates the presence of multiple phases apart from CuSnS3.\nThe obtained Raman spectra were assigned to phonon mode as per zone centre\nphonon representation of optical and acoustic modes and identified to dominant\nA symmetry modes. The maximal laser stimulated induced second harmonic\ngeneration (SHG) signal was observed for the CTS 3 film and the corresponding\nsecond order nonlinear optical susceptibility which was equal to about 0.89\npm/V at 1064 nm and the minimal SHG signal was found for the CTS 2 film (about\n0.22 pm/V). This strategic improvement in SHG and third harmonic generation\n(THG) signal efficiency endorses the role of Sn and S in modulating second and\nthird harmonic generations in CuSnS3 compound.\n