Radiative recombination in PbTe quantum wells
- 13 February 1989
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 54 (7), 653-655
- https://doi.org/10.1063/1.100908
Abstract
Recombination of quasi-two-dimensional (2D) free-electron-hole pairs in PbTe/(Pb,Eu)Te multiple quantum wells has been studied in time-resolved photoluminescence experiments in the 4–5 μm region on subnanosecond scale by an infrared upconversion method. Over a finite temperature range, the recombination rate is seen to vary approximately as 1/T, as expected for a radiative process in a nondegenerate 2D carrier gas. A model is presented where the recombination is enhanced by the presence of a substantial background hole density in the PbTe wells, generated in a manner analogous to modulation doping.Keywords
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