Solubility and Diffusion of Zinc in Gallium Phosphide

Abstract

The solubility and diffusion coefficient of zinc in gallium phosphide have been determined over a temperature range of 700–1300°C. The maximum solubility of Zn in GaP is about 4×10²⁰ atoms cm⁻³, and occurs at approximately 1200°C. The diffusion is similar to that of Zn in GaAs and can be represented by the equation: $$\text{D=1.0\hspace{0.17em}}\exp \text{[−2.1/kT]}$$ . The mechanism of diffusion evidently involves interstitial Zn as well as Zn on substitutional sites.