期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 680, 期 -, 页码 232-236出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.04.150
关键词
ZnO/ZnMgO; MQWs; Quantum-confinement effect; Resonant Raman scattering
资金
- National Natural Science Foundation of China [10774018]
- Basic Research Project for Key Laboratory of Liaoning Province [LZ2014006]
- Chinese Government Scholarship [2011GXZR70]
Multiple quantum wells (MQWs) with well-defined multilayer structure are at the foundation of fabricating optoelectronic devices with high quantum efficiency. In this study, we report the ZnO/ZnMgO MQWs fabricated under optimized conditions. At room temperature, the MQW samples, excited by a 325-nm He-Cd laser, exhibited intense ultraviolet photoluminescence (PL) tuned by the quantum confinement (QC) effect. At the same time, extremely enhanced multiple-phonon resonant Raman scattering (RRS) was observed in the first time in the PL spectra of ZnO-based MQW samples. The multiple-phonon RRS was ascribed to the ingoing and outgoing resonance with the barrier layers, and was found highly in accordance with that of ZnMgO epilayer deposited under the same conditions, thus strongly evidencing the MQW samples have well-defined multilayer structures. Using the PL spectra taken at similar to 12 K, the PL shifts induced by QC effect were found in good agreement with the calculated results using Kronig-Penney model. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据