期刊
ACS NANO
卷 15, 期 8, 页码 13674-13682出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c04908
关键词
organic photodetector; electrically switchable; color-selective; image sensor; full-color imaging
类别
资金
- Research Grants Council, University Grants Committee, Hong Kong [12302817, 12303920, C5037-18GF]
- NSFC/RGC Joint Research Scheme [N_HKBU201/19]
- Hong Kong Baptist University State Key Laboratory of Environmental and Biological Analysis [SKLP_1920_P04]
- Shenzhen Science and Technology Innovation Commission (SZSTI), China
A novel electrically switchable color-selective organic photodetector has been developed for full-color imaging, featuring high responsivity, large linear dynamic range, broad viewing angle, and high cutoff frequency. The results demonstrate a practical solution for high-resolution full-color imaging applications.
The present full-color imaging techniques rely on the use of broadband inorganic photodetectors with dedicated color filters, which is one of the practical challenges for large-area, flexible, and high-solution imaging applications. The development of high-performance color-selective photodetectors is one of the key solutions to overcome this challenge. In this work, an electrically switchable color-selective organic photodetector (OPD) comprising a double organic bulk heterojunction structure has been developed for full-color imaging. The color-selective sensing capability over the visible spectrum ranges can be realized by controlling the bias across the OPD, achieving a high responsivity of similar to 200 mA/W, a large linear dynamic range of 122 dB, a viewing angle of 120 degrees, and a -3 dB cutoff frequency of >50 kHz. A full-color imaging function has been demonstrated using electrically switchable red-, green-, and blue-color selective OPD sensors with an excellent operational stability. The results of this work provide a practical solution for applications in high-resolution full-color imaging and artificial vision.
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