SbSI microrod based flexible photodetectors

Abstract

In this paper, SbSI microrods is prepared by using a simple hydrothermal method via sulfur powder as sulfur source. The as-synthesized SbSI microrods with sulfur as sulfur powder source has better flexibility than that of SbSI with thiourea as sulfur source due to decreasing force constant between Sb and S atom. SbSI microrod based flexible photodetectors exhibit higher specific detectivity of up to 5.43 x 10(10)Jones, fast response speed (rise time and fall time of 61 ms and 128 ms, respectively) and also show low dark current less than 50 pA. Especially, the photoresponse performance of the SbSI microrod based flexible photodetectors are almost unchanged after different bending curvatures and bending times more than 2000 times.