Ferroelectric supplies are well known for his or her potential to generate photovoltaic voltages with bigger than the band-gap, making them best candidates for photodetector functions. Right here, we report a self-powered UV photodetector based mostly on Bi0.5Na0.5TiO3 (BNT) skinny movie ready by the sol-gel methodology. As in contrast with typical photodetectors based mostly on a single detection indicator, the demonstrated photodetector realizes UV gentle depth detection over a large linear vary by utilizing a present and voltage twin indicators detection methodology. When a UV gentle depth is decrease than 1.8 mW/cm2, the voltage can be utilized to detect the sunshine sign. Conversely, the present could be utilized to detect the sign. This methodology not solely broadens the linear detection vary of UV gentle depth, making it potential to detect the weak UV gentle of 45.2 nW/cm2, but in addition makes the detector maintains a comparatively excessive sensitivity throughout the detectable vary. To research the distribution of spatial UV gentle depth, a self-powered photodetector array system has been utilized to report the output voltage alerts as a map.