Ultraviolet irradiation dosimeter based on persistent photoconductivity effect of ZnO

Wang Chao-Jun^{1, 2}, Yang Xun^{1, 2, †}, Zang Jin-Hao^{1, 2}, Chen Yan-Cheng^{1, 2}, Lin Chao-Nan^{1, 2}, Liu Zhong-Xia², Shan Chong-Xin^{1, 2, ‡}

Photoresponse characteristics of the ZnO MW device at 5 V bias. The 365 nm light of a mercury lamp is employed as the UV light source. (a) I–V curves as a function of light intensity. (b) Time-resolved photocurrent rise and decay with the illumination light switched on (at 0 s) and off (2400 s). (c) Repeatable response with UV light intensity of 37.6 μm/cm². (d) Response spectrum of the ZnO MW device in semilogarithmic coordinates. The dependence of photocurrent (e) and photoconductive gain (f) of the ZnO MW device on UV light intensity.