An Ultrahigh Responsivity (9.7 mA W-1) Self-Powered Solar-Blind Photodetector Based on Individual ZnO-Ga2O3 Heterostructures

作者：Zhao, Bin; Wang, Fei; Chen, Hongyu; Zheng, Lingxia; Su, Longxing; Zhao, Dongxu; Fang, Xiaosheng^*

来源：Advanced Functional Materials, 2017, 27(17): 1700264.

DOI：10.1002/adfm.201700264

• CORE-SHELL NANOWIRES
• ULTRAVIOLET PHOTODETECTORS
• CUTOFF WAVELENGTH
• UV PHOTODETECTOR
• THIN-FILM
• FABRICATION
• EFFICIENT
• DETECTORS
• HETEROJUNCTIONS
• NANOSTRUCTURES

Highly crystallized ZnO-Ga2O3 core-shell heterostructure microwire is synthesized by a simple one-step chemical vapor deposition method, and constructed into a self-powered solar-blind (200-280 nm) photodetector with a sharp cutoff wavelength at 266 nm. The device shows an ultrahigh responsivity (9.7 mA W-1) at 251 nm with a high UV/visible rejection ratio (R-251 nm/R-400 nm) of 6.9 x 10(2) under zero bias. The self-powered device has a fast response speed with rise time shorter than 100 mu s and decay time of 900 mu s, respectively. The ultrahigh responsivity, high UV/visible rejection ratio, and fast response speed make it highly suitable in practical self-powered solar-blind detection. Additinoally, this microstructure heterojunction design method would provide a new approach to realize the highperformance self-powered photodetectors.

• 出版日期2017-5-4
• 单位发光学及应用国家重点实验室; 中国科学院; 复旦大学; 中国科学院长春光学精密机械与物理研究所