Enhancing light coupling and emission efficiencies of AlGaN thin film and AlGaN/GaN multiple quantum wells with periodicity-wavelength matched nanostructure array
文献类型：期刊论文
| 作者 | Guo, Wei; Yang, Zhenhai; Li, Junmei; Yang, Xi; Zhang, Yun; Wang, Junxi; Chee, Kuan W. A.; Gao, Pingqi; Ye, Jichun |
| 刊名 | NANOSCALE
 |
| 出版日期 | 2017 |
| 卷号 | 9期号:40页码:15477-15483 |
| ISSN号 | 2040-3364 |
| 英文摘要 | Poor light extraction efficiency (LEE) has been one of the major challenges responsible for the low external quantum efficiency of AlGaN-based ultraviolet light emitting Diodes (UV-LEDs). In this study, AlGaN nanostructure arrays were fabricated using a large-scale nanosphere self-assembly technique followed by reactive ion etching, and the transmission property of the AlGaN thin film and the photoluminescence (PL) behavior of AlGaN/GaN multiple-quantum-wells (MQWs) were investigated. A 90% light transmission value was obtained for the AlGaN thin film and a 2.5-fold increase in the band edge luminescence of the MQWs were obtained with an optimized nanostructure periodicity. Essentially, a general rule of periodicity-MQW emission wavelength matching criteria-was provided. Both the light transmission properties of the Al0.55Ga0.45N/AlN/sapphire thin film and the photoluminescence (PL) behavior of the AlGaN/GaN MQWs contribute to an improved understanding of the light extraction mechanism of PhC patterned UV-LEDs. Raman spectra also demonstrated the strain relaxation inside the MQW after nanostructure fabrication and thermal annealing. This study provides a pathway towards higher efficiency UV-LEDs with the help of a periodicity-wavelength matched nanostructure array. |
| 公开日期 | 2017-12-25 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/13562]  |
| 专题 | 2017专题 |
| 推荐引用方式 GB/T 7714 | Guo, Wei,Yang, Zhenhai,Li, Junmei,et al. Enhancing light coupling and emission efficiencies of AlGaN thin film and AlGaN/GaN multiple quantum wells with periodicity-wavelength matched nanostructure array[J]. NANOSCALE,2017,9(40):15477-15483. |
| APA | Guo, Wei.,Yang, Zhenhai.,Li, Junmei.,Yang, Xi.,Zhang, Yun.,...&Ye, Jichun.(2017).Enhancing light coupling and emission efficiencies of AlGaN thin film and AlGaN/GaN multiple quantum wells with periodicity-wavelength matched nanostructure array.NANOSCALE,9(40),15477-15483. |
| MLA | Guo, Wei,et al."Enhancing light coupling and emission efficiencies of AlGaN thin film and AlGaN/GaN multiple quantum wells with periodicity-wavelength matched nanostructure array".NANOSCALE 9.40(2017):15477-15483. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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