Ultraviolet electroluminescence from ZnO-based heterojunction light-emitting diodes fabricated on p-GaAs substrate

被引:0
|
作者
Li, Bing-Hui [1 ]
Yao, Bin [1 ,2 ]
Li, Yong-Feng [1 ]
Deng, Rui [2 ]
Zhang, Zhen-Zhong [1 ]
Liu, Wei-Wei [1 ]
Shan, Chong-Xin [1 ]
Zhang, Ji-Ying [1 ]
Shen, De-Zhen [1 ]
机构
[1] Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
[2] Department of Physics, Jilin University, Changchun 130023, China
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关键词
Molecular beam epitaxy - Magnesia - Gallium arsenide - II-VI semiconductors - Light emitting diodes - Zinc oxide - Heterojunctions - Light - Molecular beams - Semiconducting gallium - Threshold voltage - III-V semiconductors;
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摘要
ZnO-based heterojunction light-emitting diodes have been fabricated on p-type GaAs substrate by plasma-assisted molecular beam expitaxy. An electron-blocking MgO layer between thin ZnO film and p-GaAs substrate plays a key role in improving performance of the diodes. Comparing with the n-ZnO/p-GaAs heterojunction, the ZnO/MgO/p-GaAs heterojunction shows a typical diode characteristic with a forward threshold voltage of 3 V. Electroluminescence measurement indicates that the ZnO/MgO/p-GaAs heterojunction has a visible emission band attributed to the defect-related recombination in the ZnO layer and an ultraviolet emission peak.
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页码:854 / 858
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