This article is cited in 10 papers

Spectroscopy, interaction with radiation

Effect of microwave irradiation on the photoluminescence of bound excitons in CdTe:Cl single crystals

D. V. Коrbutyak, A. P. Lotsko, N. D. Vakhnyak, L. A. Demchina, R. V. Konakova, V. V. Milenin, R. A. Red'ko

Institute of Semiconductor Physics NAS, Kiev

Abstract: The effect of microwave radiation on the transformation of impurity-based structural complexes in CdTe:Cl single crystals is studied using low-temperature photoluminescence measurements. It is shown that microwave radiation activates Cl$_{\mathrm{Te}}$ centers, resulting in an increase in the intensity of photoluminescence line of excitons bound at the corresponding Cl$_{\mathrm{Te}}$ donor centers. A nonmonotonic dependence of the integrated photoluminescence intensity on the duration of microwave irradiation is observed. At the initial stage of microwave irradiation ($t$ = 30 s), an increase in the integrated excitonic photoluminescence intensity is observed; as the duration of microwave irradiation is increased, the photoluminescence intensity decreases. The experimentally observed variations in the photoluminescence intensity are athermal in nature. The hypothetical mechanism of transformation of impurity-based structural complexes is described.

Received: 16.02.2011
Accepted: 25.02.2011

 English version: Semiconductors, 2011, 45:9, 1133–1139

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