Comparative Study on Structural, Optical, Dielectric and Thermal Properties of Pure and L-Alanine Doped Bis-Thiourea Cadmium Acetate Crystal

Structural, optical, dielectric and thermal properties of pure and L-alanine (LA) doped bis-thiourea cadmium acetate (BTCA) crystals have been studied in present investigation. Pure and L-alanine (LA) doped bis-thiourea cadmium acetate (BTCA) crystals have been grown by slow evaporation technique. The crystal system of pure and doped BTCA crystal has been determined by single crystal XRD technique. The shifts in the vibrational frequencies of functional groups of doped BTCA crystal have been identified by FT-IR spectral analysis. The improved optical transparency and large transmission range of doped BTCA crystal has been assessed under UV-visible study. The enhanced optical band gap of LA doped BTCA is found to be 4.83 eV. The thermal stability of doped BTCA crystal was determined by means of thermogravimetric & differential thermal analysis. The dielectric characteristics of pure and doped BTCA crystals were investigated using dielectric studies. Significant enhancement in SHG efficiency was observed after doping LA in BTCA which is determined to be 4 times that of pure BTCA crystal.