′�?, which has a frequency of 295 cm−one, is attributed for the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−one phonon corresponds to the crystal IR absorption edge, rather than the residual absorption peak. Density functional principle computations present that the residual absorption of the BGSe https://agnesu245kez1.ourabilitywiki.com/user