Photonics Research, 2020, 8 (7): 07001243, Published Online: Jun. 30, 2020   

Polarization-enhanced AlGaN solar-blind ultraviolet detectors Download: 729次

Author Affiliations
1 State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 Key Laboratory of Electronic Materials and Devices of Tianjin, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China
4 Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China
5 Current Address: College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China
6 e-mail: sunxj@ciomp.ac.cn
7 e-mail: lidb@ciomp.ac.cn
Abstract
AlGaN solar-blind ultraviolet detectors have great potential in many fields, although their performance has not fully meet the requirements until now. Here, we proposed an approach to utilize the inherent polarization effect of AlGaN to improve the detector performance. AlGaN heterostructures were designed to enhance the polarization field in the absorption layer, and a high built-in field and a high electron mobility conduction channel were formed. As a result, a high-performance solar-blind ultraviolet detector with a peak responsivity of 1.42 A/W at 10 V was achieved, being 50 times higher than that of the nonpolarization-enhanced one. Moreover, an electron reservoir structure was proposed to further improve the performance. A higher peak responsivity of 3.1 A/W at 30 V was achieved because the electron reservoir structure could modulate the electron concentration in the conduction channel. The investigation presented here provided feasible approaches to improve the performance of the AlGaN detector by taking advantage of its inherent property.

Ke Jiang, Xiaojuan Sun, Zi-Hui Zhang, Jianwei Ben, Jiamang Che, Zhiming Shi, Yuping Jia, Yang Chen, Shanli Zhang, Wei Lv, Dabing Li. Polarization-enhanced AlGaN solar-blind ultraviolet detectors[J]. Photonics Research, 2020, 8(7): 07001243.

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