InTlP — a proposed infrared detector material

Abstract

In_1−xTl_xP is proposed as a promising material for infrared detectors. A number of key optical and structural properties are studied within local density‐functional theory. In_1−xTl_xP at x=0.67 and In_1−xTl_xAs at x=0.15 are estimated to have a gap of 0.1 eV. Their binding energies are larger than that of InSb, and they are found to form stable zinc‐blende alloys for all x. In_1−xTl_xP nearly lattice matches to InP, and offers the potential to integrate detector array and read‐out circuit.