Electron–Phonon Interaction in Composites with Colloidal Quantum Dots: A Study by Luminescence Spectroscopy and Raman Scattering

Abstract

The temperature-dependent luminescence spectra were analyzed to determine the parameters of the electron–phonon interaction (Huang–Rhys factor and the average phonon energy) for nanocomposites with colloidal CdSe/CdS/ZnS quantum dots (deposited on the surface of a glass substrate and embedded in a thin polymer film of polyisobutylene, and in a frozen colloidal solution in toluene). The measured values of the parameters are analyzed in comparison with model calculations and data obtained using the low-frequency Raman spectroscopy. It is found that in the case of a vitrified colloidal solution of quantum dots in toluene, the matrix effect leads to a noticeable change in the parameters of the electron–phonon interaction.