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Flexible Self-Powered Real-Time Ultraviolet Photodetector by Coupling Triboelectric and Photoelectric Effects
摘要： The portable UV photodetector is used to remind human timely from the overexposure to UV radiation. However, the traditional UV photodetector cannot meet the practical demands and power supply problem hinders its further development. In this work, we demonstrated a flexible, transparent and self-powered UV photodetector, by coupling of triboelectric effect and photoelectric effect. The device integrates a flexible ZnO nanoparticles (NPs) UV photodetector, a transparent and flexible film based TENG (TFF-TENG), commercial chip resisters and LEDs on PET thin film. The TFF-TENG could harvest mechanical energy from finger tapping and sliding motion and power the ZnO NPs UV photodetector to realize self-powered detection. The voltage of the constant resistors connected with 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/cm2 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 human from intense UV light.
关键词： flexible,triboelectric nanogenerator,self-powered sensor,transparent,UV photodetector
更新于2025-09-19 17:13:59
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Solution-synthesized chiral piezoelectric selenium nanowires for wearable self-powered human-integrated monitoring
摘要： Smart sensing devices with high stretchability and self-powered characteristics are essential in future generation wearable human-integrated applications. Here we report for the first time scalable synthesis and integration of selenium (Se) nanowires into wearable piezoelectric devices, and explore the feasibility of such devices for self-powered sensing applications, e.g., physiological monitoring. The ultrathin device can be conformably worn onto the human body, effectively converting the imperceptible time-variant mechanical vibration from the human body into distinguishable electrical signals, e.g., gesture, vocal movement, and radial artery pulse, through straining the piezoelectric Se nanowires. Our results suggest the potential of solution-synthesized Se nanowire a new class of piezoelectric nanomaterial for self-powered biomedical devices and opens doors to new technologies in energy, electronics, and sensor applications.
关键词： Self-powered sensor,Selenium nanowires,Wearable electronics,Human physiological monitoring,Piezoelectric device
更新于2025-09-09 09:28:46