Abstract
Using time-resolved photoluminescence spectroscopy we investigate the dynamics of exciton relaxation in CdTe/Cd1-xMnxTe multiple quantum wells. Unbound excitons are photoexcited and the timescale of formation of the donor-bound excitons varies with excitation intensity from 73 ps to <8 ps and depends on movement of the unbound exciton in the well and the capture process at the donor site. Estimates of the capture cross-section of excitons by neutral donors and of the radiative recombination time of the donor-bound exciton are made. The rate of kinetic energy relaxation of a photocreated exciton from K=0 of the electron-light hole band to K=0 of the electron-heavy hole band is found to be (2.2±0.8)× 108 eV s-1.
Original language | English |
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Pages (from-to) | 451-456 |
Number of pages | 6 |
Journal | Journal of Applied Physics |
Volume | 78 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jul 1995 |
Externally published | Yes |