The PbSe metastable phase. II. The energy gap of the CsCl-type phase of PbSe and PbSe doped with Cd

Abstract

The transmittance and reflectance spectra of films of PbSe and PbSe doped with 2 mol% Cd grown by two different non-equilibrium growth techniques, laser-assisted deposition and electron-beam evaporation, on KCl and BaF2 substrates are measured from 400 to 4000 cm-1 in the temperature range 80-300 K. The energy gaps of the metastable CsCl-type phases of PbSe and PbSe:Cd and their temperature coefficients are determined from the interference spectra. The energy profiles of the films are also obtained.