Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 17, Pages 19384-19392Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b22572
Keywords
UV photodetector; transparent; flexible; triboelectric nanogenerator; self-powered sensor
Funding
- National Natural Science Foundation of China (NSFC) [61804103, U1932124]
- National Science and Technology Major Project [2018AAA0103104]
- Natural Science Foundation of Jiangsu Province of China [BK20170343]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [18KJA535001]
- China Postdoctoral Science Foundation [2017 M610346]
- State Key Laboratory of Silicon Materials, Zhejiang University [SKL2018-03]
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University [KJS1803]
- XJTLU Key Program Special Fund [KSF-A-18]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- 111 Project
- Joint International Research Laboratory of Carbon-Based Functional Materials and Devices
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The portable UV photodetector is used to timely remind humans of overexposure to UV radiation. However, the traditional UV photodetector cannot meet the practical demands, and the power supply problem hinders its further development. In this work, we demonstrated a flexible, transparent, and self-powered UV photodetector by coupling of triboelectric and photoelectric effects. The device integrates a flexible ZnO nanoparticle (NP) UV photodetector, a transparent- and flexible-film-based TENG (TFFTENG), commercial chip resistors, and LEDs on the PET thin film. The TFF-TENG could harvest mechanical energy from finger tapping and sliding motion and power the ZnO NP UV photodetector to realize self-powered detection. The voltage of the constant resistors connected with the UV photodetector in series changes from 0.5 to 19 V under the UV light with power intensities increasing from 0.46 to 21.8 mW/cm(2) , and the voltage variation is reflected by the number of LEDs directly. The excellent flexibility and transparency of the device could extend its application scenarios; for example, such a portable device could be applied to real-time monitoring of the UV radiation to remind humans of intense UV light.
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