Enhanced rate of radiative decay in CdSe quantum dots upon adsorption of an exciton-delocalizing ligand.
basic_science · Level V
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- Record sourced from PubMed, PMID 25167466.
- Also identified by DOI 10.1021/nl5023699.
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Abstract
This paper describes the enhancement of the quantum yield of photoluminescence (PL) of CdSe quantum dots (QDs) upon the adsorption of an exciton-delocalizing ligand, phenyldithiocarbamate. Increasing the apparent excitonic radius by only 10% increases the value of the radiative rate constant by a factor of 1.8 and the PL quantum yield by a factor of 2.4. Ligand exchange therefore simultaneously perturbs the confinement energy of charge carriers and enhances the probability of band-edge transitions.
Medical subject headings
- Cadmium Compounds
- Quantum Dots
- Selenium Compounds