2D Black Phosphorus/SrTiO3 -Based Programmable Photoconductive Switch.

Liu, Fucai; Zhu, Chao; You, Lu; Liang, Shi-Jun; Zheng, Shoujun; Zhou, Jiadong; Fu, Qundong; He, Yongmin et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

A novel heterostructure is designed by stacking 2D black phosphorus (BP) on a SrTiO3 substrate. The device demonstrates programmable photoconductive switching under illumination of UV and red light. The light-tunable persistent photoconductivity exhibits a large on/off ratio exceeding 10(5) . The persistent state shows almost no relaxation or decay at low temperature. These features are suitable for a new generation of optoelectronic devices for memory application.