期刊
JOURNAL OF LUMINESCENCE
卷 248, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2022.118945
关键词
n-ZnCdO; p-GaN heterojunction; MgO electron Blocking layer; Electroluminescence; Ag nanoparticles; Localized surface plasmon
类别
资金
- National Natural Science Foundation of China [51872187, 11774241, 12074263, 21805194, 61704111]
- National Key Research and Development Program of China [2017YFB0400304]
- Science and Technology Foundation of Shenzhen [JCYJ20180305124701756]
- Funda-mental Research Project of Shenzhen [JCYJ20180508163404043, JCYJ2018030507182248925]
By introducing Ag nanoparticles onto the n-ZnCdO/MgO dual-layer structure, the electroluminescence of p-GaN and n-ZnCdO can be significantly enhanced. The enhancement is mainly due to the resonant coupling between electron-hole pairs in the emission layers and surface plasmon of Ag nanoparticles. The dual-mode emission can be achieved by adjusting the thickness of the Ag film when there is a MgO blocking layer between n-ZnCdO and p-GaN.
Herein, a n-ZnCdO/MgO dual-layer structure was prepared on p-GaN/c-Al2O3 substrate by pulsed laser deposition method. Then, a layer of Ag nanoparticles, obtained by annealing Ag films with different thicknesses in vacuum, were introduced onto the MgO film to form localized surface plasmon. n-ZnCdO/p-GaN heterojunction diodes were constructed by evaporating Ni/Au electrodes on the p-GaN surface and sintering In pellets on the nZnCdO surface. By using 6 nm and 20 nm Ag films, whose extinction spectra match to emission peak of p-GaN and n-ZnCdO respectively, electroluminescence of p-GaN and n-ZnCdO have been observably enhanced. The enhanced emissions are mainly depended on resonant coupling between electron-hole pairs in emission layers and surface plasmon of Ag nanoparticles. These results show that the heterojunction diodes can achieve the enhanced dual-mode emission by adjusting the thickness of the Ag film when the MgO blocking layer is located between n-ZnCdO and p-GaN. This work of realizing multi-color luminescence can provide an experimental method for the design of white light devices.
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