Photoluminescence Characterization of Type-II Zn0.97Mn0.03Se/ZnSe0.92Te0.08 Multiple-Quantum-Well Structures
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概要
- 論文の詳細を見る
The optical characterization of type-II Zn0.97Mn0.03Se/ZnSe0.92Te0.08 multiple-quantum-well structures has been studied using photoluminescence (PL), temperature-dependent PL, and power-dependent PL. The PL data reveal that the band alignment of the ZnMnSe/ZnSeTe multiple quantum wells (MQWs) is type II. In comparison with the theoretical calculation based on solving the Schrodinger equation of a square potential well, the valence band offset is estimated to be 0.6 eV. From the power-dependent PL spectra, it is observed that the peak position of PL spectra shows a blue shift on increasing the excitation power. The blue shift can be interpreted in terms of the band-bending effect due to spatially separated carriers in a type-II alignment and the band filling effect. The thermal activation energy ($E_{\text{A}}$) for quenching the PL intensity was determined from temperature-dependent PL spectra. The thermal activation energy was found to decrease as the thickness of ZnMnSe or ZnSeTe layers decreased.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2007-04-30
著者
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Chou Wu-ching
Institute And Department Of Electrophysics National Chiao-tung University
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Lin Der-yuh
Department Of Electronic Engineering National Changhua University Of Education
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Yang Chu-shou
Institute And Department Of Electrophysics National Chiao-tung University
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Chen Wei-li
Department Of Clinical Pharmacology Zhong Shan Hospital Fudan University
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Shiu Jian-jhin
Department Of Electronic Engineering National Changhua University Of Education
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Chen Wei-Li
Department of Electronic Engineering, National Changhua University of Education, 1, Jin De Road, Paisha Village, Changhua 500, Taiwan, R.O.C.
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Chou Wu-Ching
Institute and Department of Electrophysics, National Chiao-Tung University, 1001, Ta Hsueh Road, Hsinchu 300, Taiwan, R.O.C.
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Yang Chu-Shou
Institute and Department of Electrophysics, National Chiao-Tung University, 1001, Ta Hsueh Road, Hsinchu 300, Taiwan, R.O.C.
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Lin Der-Yuh
Department of Electronic Engineering, National Changhua University of Education, 1, Jin De Road, Paisha Village, Changhua 500, Taiwan, R.O.C.
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Shiu Jian-Jhin
Department of Electronic Engineering, National Changhua University of Education, 1, Jin De Road, Paisha Village, Changhua 500, Taiwan, R.O.C.
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