Working principle of spectrally distinctive photodetection. (IMAGE)
Caption
Schematic illustration of the nanowire structures, operation of nanowire-based photoelectrochemical photodetectors under different light illumination and the corresponding chemical reaction process at nanowire surface: Top: p-AlGaN/n-GaN nanowire; Bottom: a-MoSx decorated p-AlGaN/n-GaN nanowire. During operation, the photoresponse signal of the photoelectrochemical device is determined by the number of photo-generated carriers which effectively participate in the redox reactions, and the photocurrent polarity (either positive or negative) is determined by the type of predominate redox reaction triggered at solid/liquid interface. In other words, depending on the wavelength of the incident light, either hydrogen evolution reaction (HER) or oxygen evolution reaction (OER) will dominate in the photoelectrochemical photodetector, leading to the switch of photoconductivity.
Credit
by Danhao Wang, Wentiao Wu, Shi Fang, Yang Kang, Xiaoning Wang, Wei Hu, Huabin Yu, Haochen Zhang, Xin Liu, Yuanmin Luo, Jr-Hau He, Lan Fu, Shibing Long, Sheng Liu and Haiding Sun
Usage Restrictions
Credit must be given to the creator.
License
CC BY