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Article10.1063/1.1994246

Biexciton formation induced by bright-dark exciton transitions in (Cd,Mg)Te/CdTe/(Cd,Mn)Te asymmetric quantum wells

R. Shen-2005-01-01-AIP conference proceedings
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TL;DRAbstract

We have investigated excitonic states in (Cd,Mg)Te/CdTe/(Cd,Mn)Te asymmetric quantum wells, during the photoluminescence decay processes. The intensity ratio of biexciton to exciton showed almost a linear dependence. The biexciton luminescence showed a longer decay time as compared with that of the exciton. Our analysis leads to a conclusion that the dark exciton has an essential role when biexcitons are created in II–VI diluted magnetic semiconductor quantum wells.

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We have investigated excitonic states in (Cd,Mg)Te/CdTe/(Cd,Mn)Te asymmetric quantum wells, during the photoluminescence decay processes. The intensity ratio of biexciton to exciton showed almost a linear dependence. The biexciton luminescence showed a longer decay time as compared with that of the exciton. Our analysis leads to a conclusion that the dark exciton has an essential role when biexcitons are created in II–VI diluted magnetic semiconductor quantum wells.

Keywords

BiexcitonExcitonPhotoluminescenceQuantum wellCadmium telluride photovoltaicsLuminescenceCondensed matter physicsSemiconductor

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