Determination of the Band Disordered AlGaInP and its Influence on Visible-Laser Characteristics

Using hydrostatic pressure techniques, we have ob- tained new energies for the X-minima, L-minima and band off- sets in GaInP-AlGaInP. Theoretical calculations of the threshold current density in bulk and strained quantum-well visible lasers are shown to be in good agreement with experimental results, obtained as a function of both temperature and hydrostatic pressure. Our results show that heterobarrier leakage current is a dominant limiting factor in the performance at shorter wavelength (-635 nm) operation, but is of less significance for longer wavelength (-675 nm) operation.