Details
| Original language | English |
|---|---|
| Pages (from-to) | 451-456 |
| Number of pages | 6 |
| Journal | Journal of Applied Physics |
| Volume | 78 |
| Issue number | 1 |
| Publication status | Published - 1995 |
| Externally published | Yes |
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.
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In: Journal of Applied Physics, Vol. 78, No. 1, 1995, p. 451-456.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Dynamics of exciton relaxation and excitation transfer to donor-bound excitons in CdTe/CdMnTe quantum wells
AU - O'Neill, M.
AU - Harrison, P.
AU - Oestreich, Michael
AU - Ashenford, D. E.
PY - 1995
Y1 - 1995
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0001571099&partnerID=8YFLogxK
U2 - 10.1063/1.360732
DO - 10.1063/1.360732
M3 - Article
AN - SCOPUS:0001571099
VL - 78
SP - 451
EP - 456
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 1
ER -