A new interimpurity recombination in GaP; revised values for acceptor binding energies

Abstract

We have observed the radiative recombination of electrons, attached to nitrogen pairs, with holes on neutral acceptors. The acceptor binding energies are found to be 102.5±1 meV for Cd, 70.1±1 meV for Zn, and 54.7±1 meV for C, 8.3 meV larger than previously accepted values. This result implies corresponding increases in the band gap and exciton binding energy, to 2.350±0.002 eV and 22±2 meV, respectively, at 2 K.