Stable Copper Phosphorus Iodide (Cu2P3I2) Nano/Microwire Photodetectors

Abstract

Crystalline Cu2P3I2 nano- and microwires with high purity were synthesized through a chemical vapor transport method in evacuated silica ampoules using copper(I) iodide and red phosphorus as precursors for potential applications as photodetectors. Single-wire field-effect transistors (FET) were built to study their electronic and optoelectronic properties. The wires exhibit a p-type semiconducting behavior with an electron mobility of 31.6 cm2 V−1 s−1 and ION/IOFF ratio of ~ 103. The photodetectors are highly reproducible and stable with a short response time (40–70 ms).