A Study on Structural, Optical, Electrical and Etching Characteristics of Pure and L-Alanine Doped Potassium Dihydrogen Phosphate Crystals

Abstract

Pure potassium dihydrogen phosphate (KDP) crystals and KDP doped with L-alanine have been grown by slow evaporation technique at room temperature. Grown crystals have been characterized using powder X-ray diffraction, (XRD), Energy Dispersive X-ray spectroscopy (EDX) and Fourier Transform Infrared spectroscopy (FTIR). The presence of L-alanine into pure KDP crystal was confirmed by FTIR and EDX spectra. Crystal structure has been studied by XRD. Pure KDP and L-alanine doped KDP crystals both possessed tetragonal structure. The transparency is found to increase with the increase of doping concentrations of the grown crystals as observed by UV-Vis spectra. A.C. electrical conductivity of grown crystals along the growth axis was carried out at various temperatures ranging from

GROWTH AND CHARACTERIZATION OF CdS DOPED KDP SINGLE CRYSTALS

“…When performing measurements, Lokshin [54] assumed that HPO 4 2-ions are also responsible for the formation of vacant hydrogen bonds (L-defects). Therefore, the pH value of the initial solution, which determines its ionic composition, can be one of the most important factors that affect crystal conductivity, because of the HPO 4 2-ion concentration in the solution at some pH is higher by several orders of maginitude than the concentration of any other impurity [55]. From the above, it can be understood that the proton transport depends on the generation of L-defects.…”

“…Currently, KDP single crystals are used in industrial laser facilities as a frequency multiplier, parametric amplifier and electrooptical shutters. Many attempts have been made to modify its properties either by changing the growth condition or by adding different impurities [1][2][3][4][5][6][7].…”