Field effect on thermal emission from the 0.85hyphen;eV hole level in GaP

摘要

Results on the measurements of electric field dependence of thermal emission of holes from the 0.85hyphen;eV level in liquidhyphen;phasehyphen;epitaxial GaP, using deephyphen;level transient spectroscopy, are reported for various temperatures. The observed field dependence is analyzed in terms of Poolendash;Frenkel emission from the threehyphen;dimensional Coulomb and squarehyphen;well potentials. The field effect is found to be too weak to account for the large spread in the published emission rate data on the 0.85hyphen;eV hole level in GaP necessitating a reappraisal of its hitherto presumed origin.