Photoluminescence measurements of band discontinuity in InP-InGaPAs heterostructures

Abstract
Photoluminescence data on liquid phase epitaxial single‐well quantum well heterostructures are presented that permit the determination of the valence‐band discontinuity ΔEv in InP‐In1−xGaxP1−yAsy heterostructures at several quaternary compositions matched to InP [x≊0.453y(1+0.031y)]. The ΔEv determination, which depends on a hot‐electron to bound‐hole recombination transition, indicates that ΔEv ≊0.35ΔEg and ΔEc ≊0.65ΔEg for all InGaAsP compositions lattice matched to InP.