Synthesis and characterization of nanoparticles of semiconducting metal suplhide and their application

Abstract

Cadmium Sulphide (CdS) [II-VI group n-type semiconductor] and Copper Sulphide (Cu2S) [I-VI group p-type semiconductor] have large commercial applications like solar cell, gas sensor etc. Wide band gap CdS semiconductor was used as the transparent window material together with narrow band gap Cu2S semiconductor used as the absorber layer. Thioglycerol capped CdS and Cu2S nanoparticles were synthesized by using the non-aqueous chemical method at room temperature. CdS and Cu2S films were prepared on fluorine doped tin oxide (FTO) glass substrates by using the simple dip coating method at different dip times and heat treated in air. CdS and Cu2S nanoparticles were analysed by Ultraviolet-Visible absorption spectroscopy, photoluminescence (PL) and transmission electron microscopy (TEM). CdS and Cu2S films were investigated by scanning electron microscopy (SEM), energy dispersive analysis by X-rays (EDAX), mapping and atomic force microscopy (AFM). Thicknesses of films were determined using laser profilometer. Previously, preparation of solar cells using CdS and Cu2S films deposited by dip coating method has not been reported. In this study, thin-film solar cells with p-n heterojunction having enhanced conductivity, excellent solar energy conversion efficiency, enhanced fill factor, low cost and easy fabrication were prepared to increase the quality of solar cells.

Chemical vapor reaction synthesis and photoelectronic properties of CuS and Cu3SbS4 thin films

“…In recent years, the metal chalcogenides have attracted widespread attention and research in the application of optoelectronic devices due to their unique structure and properties [1][2][3][4]. The vast majority of chalcogenide semiconductor materials exhibit n-type semiconductor characteristics due to anionic vacancy defects [5,6], while p-type materials are helpful in forming p-n junctions to enhance performance in device applications. Most copper-based chalcogenides are p-type semiconductors, copper sulphide (Cu 2−x S) and copper antimony sulphide (Cu 3 SbS 4 ) have excellent photovoltaic and thermoelectric performance and have great potential applications for electronic devices [7][8][9].…”

Hyperfine splitting and ferromagnetism in CdS : Mn nanoparticles for optoelectronic device applications

“…Mn-doped CdS nanocrystals were prepared by using methods like the colloidal chemistry method [23] , chemical precipitation method [1, 24−29] , air-stable single-source precursor [30] , solgel method [7] , novel hydrothermal method [31] , chemical bath deposition method [32] , and so on. These nanoparticles can be used in the fabrication of photovoltaic devices due to doping of the Mn element.…”