首页|Highly stable and sensitive photon detection performance of ZnO thin film for ultraviolet light
Highly stable and sensitive photon detection performance of ZnO thin film for ultraviolet light
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NSTL
Elsevier
The photo detection characteristics of spray pyrolysis deposited ZnO thin film on glass substrate at 250 OC was demonstrated for fabrication of highly stable visible-blind UV photodetector. This photodetector exhibits lower dark current < 0.04 mu A, higher UV photosensitivity-4750, responsivity of 0.14 A/W and detectivity of 1.24 x 10(12 )Jones at an average intensity of 140 mu W/cm(2) of 340 nm. This Ag/ZnO/Ag device show excellent photo response (rise and decay) time of-4 and 6 ms with external quantum efficiency of 51%. The observed photo-current in the device is associated with adsorption and light-induced desorption of oxygen from the defect sites on the film surfaces. The adsorbed oxygen removes the electron trap centers and increasing the free carrier density in ZnO.
NSTL
Elsevier
