# Contribution of electron-phonon coupling to the luminescence spectra of single colloidal quantum dots

## TL;DR

This study investigates how electron-phonon interactions influence the luminescence spectra of single colloidal CdSe/ZnS quantum dots across various temperatures, revealing correlations between spectral features and coupling strength.

## Contribution

It introduces a model linking spectral shifts and broadening to electron-phonon coupling variations in single quantum dots, supported by experimental data.

## Key findings

- Spectral broadening and shifts depend on temperature and spectral diffusion.
- A linear correlation exists between spectral maxima and linewidth squared.
- The model explains spectral changes through slow variations in electron-phonon coupling.

## Abstract

Luminescence spectroscopy experiments were realized for single colloidal quantum dots CdSe/ZnS in a broad temperature range above room temperature in a nitrogen atmosphere. Broadening and shifts of spectra due to the temperature change as well as due to spectral diffusion processes were detected and analyzed. A linear correlation between the positions of maxima and the squared linewidths of the spectra was found. This dependence was explained by a model which takes into account the slow variation of the electron-phonon coupling strength.