论文信息 - Systematic photoluminescence study of CdxHg1-xTe alloys in a wide composition range

Systematic photoluminescence study of CdxHg1-xTe alloys in a wide composition range

A systematic photoluminescence study of CdxHg1−xTe has been carried out versus solid composition to follow step by step the evolution of the optical radiative mechanisms involved. Starting from Cd-rich samples, the recombination of bound excitons and intrinsic excitons trapped in potential fluctuations related to statistic alloy disorder has been observed over a large range of composition (0.2 < x < 1). The localization energy of excitons has been estimated from the thermal behaviour of luminescence; it exhibits a compositional dependence proportional to the alloy disorder function x(1 − x) and it amounts to about 10 meV for x ≈ 0.5.

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