Auger coefficient of GaP(Zn,O). I. Evaluation from the luminescence decay

Abstract

Measurements have been made of the luminescence time decay and Hall effect in epilayers of GaP(Zn,O). Both measurements were made on the same samples, as a function of temperature from 77 to 300°K. From the results we have been able to more accurately evaluate the Auger (nonradiative) coefficient at the nearest-neighbor (Zn,O) center. It was necessary to include the effect of screening on the energy levels in order to fit the data. After this correction, the Auger coefficient still depends on (i) the Hall factor, and (ii) the screening dependence of the transition probabilities. For a Hall factor of unity and for screening-independent transition probabilities, one obtains an Auger coefficient of (2 ± 0.5) × ${10}^{-11\mathrm{}}$ ${\mathrm{cm}}^3$/sec. The possible effect of screening on the transition probabilities was also considered, but it was not possible to tell from the data whether this correction is required.