Figure 3From: Ultraviolet photodetectors based on ZnO nanorods-seed layer effect and metal oxide modifying layer effect The dependences of photocurrents on operating time for PDs with different metal oxide coatings under UV light (365 nm) with power density of 16.7 μW/cm 2 at the bias of 2 V. (a) Before annealing; (b) after annealing at 300°C.Back to article page