Abstract
A new photoluminescence (PL) line I L in Zn x Cd 1− x S solid solutions ( x⩽ 0.15) has been studied. Two main features of the I L line, i.e. (1) concentration dependence of Stokes shift with respect to n = 1A absorption (reflection) peak (2) gradual high-energy shift at rising temperature, are due to localized exciton states (LES) produced by potential fluctuations and to spectral diffusion by phonon assisted tunneling between LES.
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