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Chin. Phys. B, 2020, Vol. 29(12): 128202    DOI: 10.1088/1674-1056/abab7b
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

Performance optimization of self-powered visible photodetectors based on Cu2O/electrolyte heterojunctions

Zhi-Ming Bai(白智明)†, Ying-Hua Zhang(张英华)‡, Zhi-An Huang(黄志安), Yu-Kun Gao(高玉坤), and Jia Liu(刘佳)
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Abstract  The performance of the self-powered photodetectors based on the Cu2O/electrolyte heterojunctions is optimized by adjusting morphology and structure of the Cu2O film. The Cu2O film with a deposition time of 2000 s possesses a largest current density of 559.6 μ A/cm2 under visible light illumination at zero bias, with a rising time of 5.2 ms and a recovering time of 9.0 ms. This optimized Cu2O film has a highest responsivity of about 25.8 mA/W for visible light, and a negligible responsivity for UV light. The high crystallinity and excellent charge transfer property are responsible for the improved photodetection performance.
Keywords:  self-powered      visible      photodetector      Cu2O      photoelectrochemical  
Received:  14 May 2020      Revised:  02 July 2020      Accepted manuscript online:  01 August 2020
PACS:  82.47.Jk (Photoelectrochemical cells, photoelectrochromic and other hybrid electrochemical energy storage devices)  
  85.60.Gz (Photodetectors (including infrared and CCD detectors))  
  81.20.Ka (Chemical synthesis; combustion synthesis)  
  72.40.+w (Photoconduction and photovoltaic effects)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51602021) and the Fundamental Research Funds for the Central Universities, China (Grant No. FRF-TP-18-023A2).
Corresponding Authors:  Corresponding author. E-mail: baizhiming2008@126.com Corresponding author. E-mail: zhangyinghuaustb@sina.com   

Cite this article: 

Zhi-Ming Bai(白智明), Ying-Hua Zhang(张英华), Zhi-An Huang(黄志安), Yu-Kun Gao(高玉坤), and Jia Liu(刘佳) Performance optimization of self-powered visible photodetectors based on Cu2O/electrolyte heterojunctions 2020 Chin. Phys. B 29 128202

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