摘要
Investigations of two-dimensional(2D)/one-dimensional(1D)van der Waals(vdW)heterojunctions have attracted significant attention due to their excellent properties such as the smooth heterointerface,the highly gate-tunable bandgap,and the ultrafast carrier transport.However,the complicated method of manufacturing vdW heterojunction represents a major problem that severely limits their practical applications.Herein,we develop one-step hydrothermal method and use it to synthesize 2D PbI_(2)/1D Pb_(5)S_(2)I_(6)vdW heterojunction.The PbI_(2)/Pb_(5)S_(2)I_(6)vdW heterojunction photodetector(PD)displays lower dark current(<20 pA),higher responsivity(up to 134 mA·W-1),self-powered and wider response spectrum in comparison with that of pristine PbI_(2)PD and Pb_(5)S_(2)I_(6)PD.This one-step hydrothermal method provides a new idea for preparing other mixed-dimensional heterojunction.
基金
National Natural Science Foundation of China(No.61376017)。
