BURSTEIN–MOSS SHIFT IN CdS NANOCRYSTALLITES SYNTHESIZED VIA AQUEOUS PRECIPITATION

Abstract

We report here the UV-VIS study of CdS nanoparticles synthesized via Chemical precipitation in aqueous medium, the UV-VIS of CdS in aqueous medium shows an excitonic peak at 230 nm, while that of CdS quantum dots in solid form shows an absorption maximum at 480 nm. This bleaching of band gap may be attributed to Moss–Burstein shift in the absorbance edge.

Theory of Burstein-Moss effect in semiconductors with anisotropic energy bands

“…The difference between the optical and true band gaps has been studied in many bulk semiconductors and semiconductor devices [2][3][4][5][6]. The last decades have been marked by intensive study of this effect in various types of nanostructures [7][8][9][10]. Saleh and Soliman [11] have analysed the junction photon detectors based upon the Burstein effect.…”