Free Exciton Luminescence and its Sample Dependence in Alkali Iodides

Abstract

The spectrum and the quantum yield of the 1s free exciton luminescence in alkali iodides have been studied as a function of temperature. These results are strongly dependent on the samples used. On the basis of these results the intrinsic nature of the luminescence process and the self-trapping process of the 1s free excitons has been studied.