Investigations on the Emergence of the Bandgap Anomaly between II-VI and their analogous I-III-VI₂ Compounds on the Basis of the Zn_2-2xCu_xIn_xS₂ Solid Solution System

1 January 2000

journal article
Published by IOP Publishing in Japanese Journal of Applied Physics

Vol. 39 (S1)
https://doi.org/10.7567/jjaps.39s1.164

Abstract

The Zn_2-2xCu_xIn_xS₂ solid solution system has been investigated with respect to the emergence of the bandgap anomaly between II-VI and IB-Ill-VI₂ compounds. Cation-S bond lengths and bandgap E_g have been determined as a function of the sample composition x. The bond lengths are found to be constant over the whole composition range in first approximation. Band structure calculations were applied to simulate the highly non-linear E_g(x). The appearance of Cu3d states at the top of the valence band was shown to cause this dependence in the course of intermixing. The cation-S bond lengths, however, determine the degree of the bandgap anomaly.

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Investigations on the Emergence of the Bandgap Anomaly between II-VI and their analogous I-III-VI2 Compounds on the Basis of the Zn2-2xCuxInxS2 Solid Solution System

Abstract

Keywords

Investigations on the Emergence of the Bandgap Anomaly between II-VI and their analogous I-III-VI₂ Compounds on the Basis of the Zn_2-2xCu_xIn_xS₂ Solid Solution System