NEUMANN, H.; HÖRIG, W.; NOOKE, G.; SYRBU, N. N.
(Elservier, 1988)
Optical absorption spectra of PbGa2S4 are measured in the photon energy range from 2.0 to 3.2 eV and for temperatures between 32 and 300 K. PbGa2S4 is found to be an indirect-gap semiconductor with a gap energy of 2.84 eV ...