Time-resolved photoluminescence properties of hybrids based on inorganic AlGaN/GaN quantum wells and colloidal ZnO nanocrystals

被引：1

作者：

Forsberg, Mathias ^{[1
]}

Hemmingsson, Carl ^{[1
]}

Amano, Hiroshi ^{[2
]}

Pozina, Galia ^{[1
]}

机构：

[1] Linkoping Univ, Dept Phys Chem & Biol IFM, S-58183 Linkoping, Sweden

[2] Nagoya Univ, Dept Elect Engn & Comp Sci, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2015年 / 87卷

基金：

瑞典研究理事会;

关键词：

Quantum well structures; Energy transfer; EXCITONS; NANOSTRUCTURES;

D O I：

10.1016/j.spmi.2015.07.017

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Dynamic properties are studied for the AlGaN/GaN quantum well (QW) structures with and without the coating of colloidal ZnO nanocrystals (NCs). The QW exciton recombination rate was reduced in such hybrids compared to the bare QW structure only in the sample with the thinnest cap layer of 3 nm. Assuming that one of the recombination mechanisms in this hybrid is non-radiative resonant energy transfer (NRET) between the QW and the energy acceptor material i.e. ZnO NCs, the maximum pumping efficiency was estimated to be similar to 42% at 60 K. The NRET effect is, however, vanished after several months despite that the hybrid structures are composed of chemically stable components. (C) 2015 Published by Elsevier Ltd.

引用

页码：38 / 41

页数：4

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