Investigation on unidirectionally grown potassium acid phthalate single crystal by Sankaranarayanan–Ramasamy (SR) method for optical applications

A bulk size single crystal of Potassium Acid Phthalate was successfully harvested by Sankaranarayanan–Ramasamy method by keeping (010) oriented seed at the bottom. The quality of the grown single crystal was assessed by high-resolution X-ray diffraction technique. The optical quality of the grown single crystal was examined by UV–Vis analysis, which confirms its suitability for nonlinear optical applications. Its luminescence behavior was tested by photoluminescence (PL) and time-resolved PL, respectively. The color coordinates were estimated using the emission spectrum through the CIE chromaticity diagram. The surface morphological pattern was thoroughly studied by scanning electron microscopy (SEM) method.