Impact of increasing concentration of l-alanine environment on structural, UV–vis, SHG efficiency, luminescence and dielectric traits of zinc thiourea chloride (ZTC) crystal

Abstract

The current investigation is aimed to explore the enhancing effect of increasing concentration of amino acid L-alanine (LA) on decisive optical traits of zinc thiourea chloride (ZTC) crystal. The most commercial slow solvent evaporation technique has been adapted to grow pure and LA influenced ZTC crystals at room temperature. The powder X-ray diffraction analysis has been carried out to determine the crystallographic data and analyze the crystalline phase and purity of pure and LA influenced ZTC crystals. The constituent elements of grown crystals have been evaluated by means of energy dispersive spectroscopic technique. The influence of LA on optical transparency of ZTC crystal in range of 190–1000 nm has been ascertained by means of UV-visible spectral analysis. The optical band gap of grown crystals has been evaluated using the transmittance data to discuss the technological impetus of grown crystals for optical devices. The Kurtz-Perry test has been performed to determine the positive impact of organic ligand of LA on second harmonic generation (SHG) efficiency of ZTC crystals. The SHG efficiency of LA influenced ZTC crystal is found to be remarkably higher than pure ZTC and potassium dihydrogen phosphate crystal materials. The effect of LA on photoluminescence nature of ZTC crystal has been investigated in the range of visible region. The impact of LA on temperature dependent dielectric response of ZTC crystal has been investigated within the range of 30–90 °C.