標題: | Radiative recombination of indirect exciton in type-II ZnSeTe/ZnSe multiple quantum wells |
作者: | Chia, Chin-Hau Fan, Wen-Chung Lin, Yen-Chen Chou, Wu-Ching 電子物理學系 Department of Electrophysics |
關鍵字: | ZnSeTe;Type-II quantum well;Time-resolved photoluminescence;Exciton |
公開日期: | 1-五月-2011 |
摘要: | The tunability of the emission energy, oscillator strength and photoluminescence (PL) efficiency by varying the well thickness and excitation density was demonstrated in the ZnSe(0.8)Te(0.2)/ZnSe multiple quantum wells. A significant blueshift about 260 meV of the PL peak energy was observed as the well width decreased from 5 to 1 nm. An extraordinary long lifetime (300 ns) of the recombination for the widest sample was detected. The binding energy of the indirect excitons is determined as 12 meV for the thinnest sample. The reduction of PL efficiency by thermal energy is greatly suppressed by employing a high excitation power. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.jlumin.2010.12.031 http://hdl.handle.net/11536/8970 |
ISSN: | 0022-2313 |
DOI: | 10.1016/j.jlumin.2010.12.031 |
期刊: | JOURNAL OF LUMINESCENCE |
Volume: | 131 |
Issue: | 5 |
起始頁: | 956 |
結束頁: | 959 |
顯示於類別: | 期刊論文 |