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.
Original language | English (US) |
---|---|
Pages (from-to) | 5323-5328 |
Number of pages | 6 |
Journal | Nano Letters |
Volume | 14 |
Issue number | 9 |
DOIs | |
State | Published - Sep 10 2014 |
Keywords
- CdSe quantum dot
- dithiocarbamate
- exciton delocalization
- oscillator strength
- radiative decay
ASJC Scopus subject areas
- Bioengineering
- General Chemistry
- General Materials Science
- Condensed Matter Physics
- Mechanical Engineering