SYNTHESIS, GROWTH AND PHYSICOCHEMICAL PROPERTIES OF NONLINEAR OPTICAL MATERIAL: L-LYSINE CADMIUM BROMIDE (LCB)

Physics

A good quality single crystal of L-lysine cadmium bromide (LCB) with optimum size 7 mm x 3 mm x 2 mm was obtained within a period of 40 to 45 days. The grown L-lysine cadmium bromide (LCB) crystals have been subjected to single crystal X- ray diffraction studies to determine the unit cell dimensions and cell parameters. It is observed from the single crystal XRD studies that LCB crystal belongs to orthorhombic crystal system with space group P212121. The calculated lattice parameter are a = 5.87 Å, b = 6.35 Å, c = 17.85 Å, α = β = γ = 90° and Volume V = 665.34 Å3. The crystalline nature of the grown crystal was determined by the Powder X-Ray Diffraction (PXRD) studies. Infrared spectra are an important record, which provide more information about the structure of a compound. The fluorescence spectral study was carried out in the range of 280–500 nm. In this technique almost all functional groups presented in a molecule within definite range of frequency was confirmed. A polished and suitable size of LCB crystal was subjected to optical transmission study. This reveals that the LCB crystal has a very low UV cut-off wavelength (237 nm) along with large transmission window in the entire visible region. Also, the absence of absorption in the range of 237-1100 nm indicates that crystal has good optical transmission with lesser defects. The SHG efficiency of LCB crystal was found to be about 2 times greater than that of KDP. Vickers hardness number of as grown LCB crystal is found to be increase with the applied load. The dielectric study of LCB crystal was carried out as a function of frequency at different temperatures. The photoconductivity nature was analyzed by photoconductivity study.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.