发光学报2013，Vol.34Issue(7)：872-876,5.DOI:10.3788/fgxb20133407.0872
非对称ZnO/ZnMgO双量子阱内量子效率的提高
Improvement of Internal Quantum Efficiency of Asymmetric ZnO/ZnMgO Multi-quantum Wells
摘要
Abstract
We report a dramatic increase in the internal quantum efficiency (IQE) of ZnO/ZnMgO multi-quantum wells (MQWs) fabricated on c-plane sapphire substrate by introducing asymmetric double-quantum-well (ADQW) structure.A marked enhancement in efficiency,by as much as 1.56 times,was observed for the ZnO/ZnMgO five-period ADQW grown by plasma-assisted molecular beam epitaxy (P-MBE),compared to the ten-period symmetrical MQWs with asymmetric structure.The effects of excitons tunneling from the narrow well to the wide well,which was proved by photoluminescence spectra and time-resolved photoluminescence spectroscopy,can influence the IQE.关键词
ZnO/量子阱/激子隧穿/内量子效率Key words
ZnO/ quantum wells/ excitons tunneling/ internal quantum efficiency分类
数理科学引用本文复制引用
尚开,张振中,李炳辉,徐海阳,张立功,赵东旭,刘雷,王双鹏,申德振..非对称ZnO/ZnMgO双量子阱内量子效率的提高[J].发光学报,2013,34(7):872-876,5.基金项目
国家自然科学基金(21100146) （21100146）
国家"973"计划(2011CB302006,2011CB302002)资助项目 （2011CB302006,2011CB302002）
