The UV radiation is both beneficial and harmful for human health,but it not visible for human eye,so it needs to be detected.Among various types of UV detectors,photochemical type UV detectors have attracted much attention for their simple fabricated process,fast response speed,low cost and self-powered and so on.In this work,commercial P25 nanospheres were scraped on FTO conductive glass substrate and assembled sandwich structure photochemical type UV detectors.Under the irradiation of 365 nm with 35 mW·cm-2,the open circuit voltage of the device is 0.576 V,the short circuit current density reaches 1.045 mA·cm-2,the response rise time is 0.010 s and the recovery time is 0.01 s. Under the periodic ultraviolet irradiation,the device also shows a stable and reproducible switching performance.In addition,the device still shows excellent visible light blindness characteristics and linear input and output characteristics.
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