BAND-GAP ENERGY AND BAND LINEUP OF III-V-ALLOY SEMICONDUCTORS INCORPORATING NITROGEN AND BORON

The band gap energy and band lineup of 15 binary, 42 ternary and 39 quaternary III-V alloy semiconductors composed of (B, Al, Ga, In)(N, P, As, Sb) are calculated by mean of the dielectric method of Van Vechten and the Harrison model, respectively. The alloys including N are predicted to have negative band gap energy in most of the compositional range due to the large electro- negativity of nitrogen atom. Possible material combinations for a lattice-matched doubleheterostructure for blue-light-emitting devices are discussed. The chart presented here will be useful in designing blue-to-ultraviolet light emitters with and without strain in the devices.