Abstract
In this paper, the observation of LO-phonon progressions in the low temperature (4.2 K) photoluminescence excitation spectra of different types of colloidal NCs is reported. The strength of the exciton-LO-phonon coupling at 4.2 K, as reflected by the Huang–Rhys parameter S, increases from CdSe QDs (S = 0.8–1.0) to Type-I1/2
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