ISSN: 2574-187X
Authors: Sathyaseelan B*
Of late well-known unique semi-organic NLO (nonlinear optical) material L-tyrosine zinc acetate (LTZA) single crystal was synthesized and its importance single crystals developed from aqueous solution by slow evaporation technique. The grown crystals LTZA were characterized using single crystal XRD and confirmed by powder XRD. Using FT-IR spectroscopy the functional groups and the modes of vibrations of LTZA were identified. The UV-Vis- NIR transmittance spectrum shows that good transmittance in the visible region with the lower cutoff wavelength at 235 nm. The energy band gap value is 5.289eV. The thermal decomposition process was examined by TGA and DTA. The surface features are examined by SEM. The mechanical strength of LTZA was estimated by micro hardness studies. The dielectric response of the crystal with different range of frequencies and temperature were studied. The frequency dependence of ac conductivity for various temperatures was studied. Photoconductivity study was carried out to analyze the response of LTZA crystal to the incident visible light. The Kurtz powder SHG test shows that the LTZA crystal is an efficient applicant for optical SHG. The conversion efficiency is around 3 times that of KDP and also one of the highest values in L-tyrosin family of the properties information that the present material may be an effective applicant for optoelectronic devices.
Keywords: Single crystal growth; XRD; FTIR; Optical absorption spectrum; TG-DTA analysis; Dielectric studies; SHG
