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, ‡}

Method for determining the UV accumulation using photocurrent. (a) Time-resolved photocurrent changes of the ZnO MW device when the UV light intensity changes intermittently. The two curves present two different test processes (test-1 and test-2). The UV light intensity of each period is denoted in the figure. (b) The relationship between photocurrent and UV accumulation in the two tests, compared with the reference plot from Fig. 4(c). (c) The relative error of the inferred UV accumulation for the two tests.