Photoluminescent properties of Er-doped In1−xGaxP prepared by metalorganic vapor phase epitaxy

Abstract
Atmospheric pressure metalorganic vapor phase epitaxy has been used to prepare Er‐doped In1−xGaxP layers using an Er beta‐diketonate precursor as the dopant source. Temperature‐dependent photoluminescent properties were studied as a function of alloy composition for x=0–0.98. All the Er‐doped In1−xGaxP layers exhibited strong characteristic Er3+ intra‐4f‐shell photoluminescent emission at 0.801 eV which was independent of the alloy composition. A thermal quenching of the Er3+‐related emission was observed and depended on the alloy composition. For In1−xGaxP alloys with x≳0.2, Er3+‐related luminescence is observed at 295 K.