Photoluminescence and impurity concentration in GaxIn1−xAsyP1−y alloys lattice-matched to InP

Abstract
The photoluminescence spectra of GaInAsP alloys are examined as a function of impurity concentration at several different temperatures and alloy compositions. The photoluminescence linewidth depends on both the impurity concentration and temperature, and our experimental results at 295 °K are described by the empirical relation: NDE) =9.1×1011 exp(ΔE/4.3 ×103) cm3. It is proposed that photoluminescence linewidth can be used for a simple and rapid determination of the impurity concentration for n‐ and p‐type samples whose total impurity concentration lies in the range 1016 cm3 <ND +NA 19 cm3.