Optical, P-XRD & U-V Properties by Varying the Concentration of L-valine Amino Acid in Pure KDP

Abstract: H2PO4 potassium dihydrogen phosphate crystals (KDP) were prepared for dopant L- valine amino acid. The bulk growth was reported along <011> and <101> plane by seed rotating crystal method and solution growth method. The doping concentrations in the mother solution were 0.4 mole%, 0.6 mole% and 0.8 mole% and the corresponding seed rotation rates were 30 rpm, 60 rpm and 100 rpm for 15 to 20 days. KDP crystal of dimensions 102 x 23 mm, 72 x 23 mm and 102 x 35 mm size has been grown. FTIR spectra showed the presence of functional groups in the crystal. Powder X-ray diffraction analysis of transparent bulk nonlinear optical crystal doped with LV confirms the formation of the tetragonal system. Energy Dispersive X-ray analysis (EDAX) confirms the elemental analysis of potassium and phosphate radicals in the reported crystal. Optical transmission increases with the increase of concentration of L-valine in KDP crystals. Keywords: Crystal growth, Symmetry, FTIR, UV, EDAX.