GROWTH AND CHARACTERIZATION OF CdS DOPED KDP SINGLE CRYSTALS

O V Mary Sheeja, C K Mahadevan

Abstract: Pure and CdS added potassium dihydrogen phosphate (KDP) single crystals (a total of six) have been grown by the slow evaporation method at room temperature. Powder X-ray diffraction, atomic absorption spectroscopic and Fourier transform infrared spectral measurements were done to characterize the grown crystals structurally and chemically. Thermal and mechanical stabilities were understood by making respectively the thermogravimetric and microhardness measurements. The optical transmittance and second harmonic generation efficiency were understood by making respectively the UV-Vis-NIR spectral and nonlinear optical measurements. The AC and DC electrical measurements made on all the six grown single crystals indicate a normal dielectric behaviour. The electrical parameters, viz. dielectric constant, dielectric loss factor and AC and DC electrical conductivities are found to increase with the increase in temperature in the range (40 – 150oC ) considered in the present study. The estimated AC and DC activation energies are found to vary nonlinearly with the impurity concentration.

Keywords: Crystal growth, Doped crystals, KDP crystals, Physical properties, X-ray diffraction.

DOI: https://doi.org/10.15623/ijret.2013.0212125