Abstract
Temperature-dependent photoluminescence (PL) and contactless electroreflectance (CER) were used to characterize a ZnxCd 1-xSe/Znx′Cdy′Mg 1-x′-y′Se asymmetric coupled quantum well (ACQW) structure in the range of 10-300 K. The PL peak position yielded information of the fundamental excitonic recombinations. A detailed analysis of the CER spectra led to the identification of various interband transitions. The intersubband transitions were then estimated and found to be in a good agreement with the previous report of Fourier-transform infrared absorption measurements. At low temperature, the PL spectra of the sample showed an asymmetric behavior with an exponential tail at the lower-energy side and were attributed to the localized excitonic recombinations due to potential fluctuations. Detailed study of the temperature dependence of the excitonic transition energies indicated that the main influence of temperature on the quantized transitions is through the temperature dependence of the band gap of the constituent material in the well.
| Original language | English |
|---|---|
| Pages (from-to) | 3751-3755 |
| Number of pages | 5 |
| Journal | Journal of Alloys and Compounds |
| Volume | 509 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2011 Mar 3 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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Temperature-dependent photoluminescence and contactless electroreflectance characterization of a ZnxCd1-xSe/Zn x′Cdy′Mg1-x′-y′Se asymmetric coupled quantum well structure. / Wu, J. D.; Huang, Y. S.; Lin, D. Y.; Charles, W. O.; Shen, A.; Tamargo, M. C.; Tiong, K. K.
In: Journal of Alloys and Compounds, Vol. 509, No. 9, 03.03.2011, p. 3751-3755.Research output: Contribution to journal › Article
TY - JOUR
T1 - Temperature-dependent photoluminescence and contactless electroreflectance characterization of a ZnxCd1-xSe/Zn x′Cdy′Mg1-x′-y′Se asymmetric coupled quantum well structure
AU - Wu, J. D.
AU - Huang, Y. S.
AU - Lin, D. Y.
AU - Charles, W. O.
AU - Shen, A.
AU - Tamargo, M. C.
AU - Tiong, K. K.
PY - 2011/3/3
Y1 - 2011/3/3
N2 - Temperature-dependent photoluminescence (PL) and contactless electroreflectance (CER) were used to characterize a ZnxCd 1-xSe/Znx′Cdy′Mg 1-x′-y′Se asymmetric coupled quantum well (ACQW) structure in the range of 10-300 K. The PL peak position yielded information of the fundamental excitonic recombinations. A detailed analysis of the CER spectra led to the identification of various interband transitions. The intersubband transitions were then estimated and found to be in a good agreement with the previous report of Fourier-transform infrared absorption measurements. At low temperature, the PL spectra of the sample showed an asymmetric behavior with an exponential tail at the lower-energy side and were attributed to the localized excitonic recombinations due to potential fluctuations. Detailed study of the temperature dependence of the excitonic transition energies indicated that the main influence of temperature on the quantized transitions is through the temperature dependence of the band gap of the constituent material in the well.
AB - Temperature-dependent photoluminescence (PL) and contactless electroreflectance (CER) were used to characterize a ZnxCd 1-xSe/Znx′Cdy′Mg 1-x′-y′Se asymmetric coupled quantum well (ACQW) structure in the range of 10-300 K. The PL peak position yielded information of the fundamental excitonic recombinations. A detailed analysis of the CER spectra led to the identification of various interband transitions. The intersubband transitions were then estimated and found to be in a good agreement with the previous report of Fourier-transform infrared absorption measurements. At low temperature, the PL spectra of the sample showed an asymmetric behavior with an exponential tail at the lower-energy side and were attributed to the localized excitonic recombinations due to potential fluctuations. Detailed study of the temperature dependence of the excitonic transition energies indicated that the main influence of temperature on the quantized transitions is through the temperature dependence of the band gap of the constituent material in the well.
UR - http://www.scopus.com/inward/record.url?scp=79551684136&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79551684136&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2010.12.207
DO - 10.1016/j.jallcom.2010.12.207
M3 - Article
AN - SCOPUS:79551684136
VL - 509
SP - 3751
EP - 3755
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
IS - 9
ER -