Photoresponsivity of the ZnO nanoneedle array/water UV detector. (a) Typical I-V characteristics of the ZnO nanoneedle array/water UV photodetector in darkness and under the illumination of 1.25 mW/cm2 of UV light (λ = 365 nm). (b) Spectral responsivity characteristic of the UV detector under 0-V bias. (c) Photoresponse current versus UV illumination intensity under 0-V bias and 365-nm UV light irradiation.
Li et al. Nanoscale Research Letters 2013 8:415 doi:10.1186/1556-276X-8-415