Phosphorus–hydrogen complexes in LEC‐grown InP

Abstract

AbstractIn LEC‐grown InP, about 30 sharp vibrational absorption lines are measured in the frequency region 2200 to 2350 cm–1. All these lines are due to phosphorus‐hydrogen stretching modes. Experiments on InP containing both hydrogen and deuterium finally proved that the line at 2202.4 cm–1 is due to a single hydrogen atom bonded to P in an indium vacancy (VIn) and that the line at 2315.6 cm–1 is due to the complex of four P–H bonds in an VIn. In InP:H:D, this VInH4 complex gives rise to six vibrational lines in the region of P–H modes and six lines in the region of P–D modes because of the five different types of VInHnDm complexes. The measured frequencies of these 12 lines are in excellent agreement with those obtained from ab initio calculations reported in the literature. Additional P–H complexes are discussed. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)