A Real‐Time Wearable UV‐Radiation Monitor based on a High‐Performance p‐CuZnS/n‐TiO2 Photodetector

• DOI: 10.1002/adma.201803165
• Publication Date: 2018-08-30T14:39:27Z
• Authors: Xiaojie Xu; Jiaxin Chen; Sa Cai; Zhenghao Long; Yong Zhang; Longxing Su; Sisi He; Chengqiang Tang; Peng Liu; Huisheng Peng; Xiaosheng Fang
• Keywords: Ultraviolet

Solar radiation, especially ultraviolet (UV) light, is a major hazard for most skin-related cancers. The growing needs wearable health monitoring systems call high-performance real-time UV sensor to prevent skin diseases caused by excess exposure. To this end, here novel self-powered p-CuZnS/n-TiO2 photodetector (PD) with high performance successfully developed (responsivity of 2.54 mA W-1 at 0 V toward 300 nm). Moreover, effectively replacing the Ti foil thin wire anodization process, conventional planar rigid device artfully turned into fiber-shaped flexible and one. shows an outstanding responsivity 640 A , external quantum efficiency 2.3 × 105 %, photocurrent ≈4 3 V, exceeding those current PDs. Its ultrahigh enables it be easily integrated commercial electronics function as monitor system. Thus, first radiation that reads out ambient power density transmits data smart phones via wifi demonstrated. This work not only presents promising monitor, but also provides general strategy designing fabricating electronic devices.