Local-field effects on the spontaneous emission rate of CdTe and CdSe quantum dots in dielectric media

Sander F Wuister; Celso de Mello Donega; Andries Meijerink

doi:10.1063/1.1773154

Local-field effects on the spontaneous emission rate of CdTe and CdSe quantum dots in dielectric media

J Chem Phys. 2004 Sep 1;121(9):4310-5. doi: 10.1063/1.1773154.

Authors

Sander F Wuister¹, Celso de Mello Donega, Andries Meijerink

Affiliation

¹ Debye Institute, Chemistry of Condensed Matter, Utrecht University, P.O. Box 80 000, 3508 TA Utrecht, The Netherlands.

PMID: 15332980
DOI: 10.1063/1.1773154

Abstract

The refractive index dependence of the spontaneous emission rate is determined using organically capped CdSe and CdTe quantum dots as probes. The radiative lifetime of the exciton emission is measured in a variety of apolar solvents with refractive indices n between 1.37 and 1.50. It is demonstrated that quantum dots provide a model system for testing theories on the influence of local-field effects on the spontaneous emission rate. The experimentally observed influence of n on the radiative lifetime is smaller than predicted by well-known models for local-field corrections but is in good agreement with a recently developed fully microscopic model for the local-field enhancement of the spontaneous emission rate.