3d-Transition Metal Related Photoluminescence in In1-xGaxP Alloys

Photoluminescence spectra related to a series of 3d transition metals (V, Cr, Co and Ni) in In1-xGaxP alloys have been systematically measured at liquid He temperature. The spectra in In1-xGaxP have shown broad bands without characteristic zero-phonon lines which can be observed in both GaP and InP. In particular, Co-related spectra in In1-xGaxP (0.74<x<1) have been precisely investigated and analyzed, the results showing that such broad bands are due to the perturbation by disordering of Ga and In atoms in the cation sublattice of In1-xGaxP alloys.