Electrical properties of CdTe/CdS heterojunctions obtained by closed-tube chemical transport

Abstract

and Laboratorio MAXPEC, C.N.R., P a r m ( b ) CdTe-CdS heterojunctions are prepared by growing epitaxial layers of CdTe on the basal plane of C d s single crystals. A closed-tube chemical transport technique is used, with hydrochloric acid as transporting agent. Current-voltage characteristics a t different temperatures, capacitancevoltage and capacitance-frequency curves are investigated for various Au-CdTe-CdS-In structures. The experimental results indicate that the electrical characteristics of these junctions are strongly dependent on the deposition face, (0001) or (OOOI), of the substrate; they can be explained by a recombination-tunneling mechanism via interface states.Des heterojunctions CdTe-CdS ont Bt6 rkalis6es, croissant des couches Bpitaxiques de CdTe sur la couche basale des monocristaux de CdS. On a utilize la technique du transport chimique dans le tube ferm6, employant I'acide hydrochlorique comme agent transporteur. Les caracteristiques cournat-voltage a temperatures diffbrentes, les courbes capacit&voltage e t capacitb-frkquence ont BtB Btudihes pour plusieurs structures Au-CdTe-CdS-In. Les resultats expkrimentals demontrent que les caractkristiques electriques de la jonction sont fortement dependants de la face (0001) ou (0001) de la souscouche; elle sont expliqubes on moyen de un mecanism de recombinasion-tunneling par des Btats de interface.

Fabrication and characterization of n-type cadmium telluride nanowires for thin-film solar cell applications

“…Cadmium sulfide-cadmium telluride heterojunction devices are a leading technology for thin film solar cells [1][2][3][4][5][6][7][8][9][10][11]. Relatively high power conversion efficiency values have already been achieved in these devices [2][3][4].…”

Electrical Properties of RF Sputtered CdTe/CdS Thin Film Solar Cells

“…Most of the reported work on CdTe/CdS solar cells is focused on opto-electronic properties. There are only a few studies on the electrical properties of CdTe/CdS solar cells [6][7][8]. In this paper, the electrical characteristics of RF sputtered CdTe/CdS solar cells have been investigated and the results are presented.…”