Abstract

Current study is first ever computational study to predict optical and electronic properties of Na doped CdS system. A good comparison among optical properties of pure CdS and its doping with various Na concentrations (3.12%, 6.25%, 9.37%) is shown in our study. Cd atoms are substituted with Na atoms and a change in optical properties is studied while size of supercell (1×2×2) is kept constant for all cases. In comparison to absorption of pure CdS, the absorption shows blueshift upon increase in Na concentrations and refractive index first increase and then decreases for higher Na concentration (9.37%). Absorption increases in the visible region while for UV region it somehow shows oscillatory trend. Entire study has been executed using Wien2k code by employing PBE-GGA approximation and the manuscript is furnished with detailed discussions regarding plausible applications of CdS:Na system which highlight future directions of this material. Moreover, insight into optical properties of CdS:Na system shows surprising results which appeal candidacy of this material to be potentially used for device fabrication in the field of optoelectronics, non-linear optics, dielectrical electronics, functional microelectronics, electrostatic capacitors and piezoelectric transducers.

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