A Determination of the Band Gap of Zn₃P₂

Abstract

The excitation spectum of a photoluminescence band at 2pm was measured at liquid nitrogen temperature. A model for an indirect material has been fitted to the spectrum and gives a band gap of 1.26 eV.

Energy Band Structure of Zn3P2-Type Semiconductors: Analysis of the Crystal Structure Simplifications and Energy Band Calculations

“…These results are in good agreement with the calculations [28] done within the antifluorite approximations by EPM, where the value 1:59 eV has been obtained for the direct energy band gap in Zn 3 P 2 . There are also experimental works in which an indirect band gap has been reported, for instance: 1:26 eV [20], 1:315 eV [16,21] and 1:4 eV [35] at room temperature. Theoretical support for these results are the calculations [27] where the value of 1:41 eV has been found for the indirect band gap.…”