Enhanced rate of radiative decay in cdse quantum dots upon adsorption of an exciton-delocalizing ligand

Shengye Jin, Rachel D. Harris, Bryan Lau, Kenneth O. Aruda, Victor A. Amin, Emily A. Weiss

Research output: Contribution to journalArticle

40 Citations (Scopus)

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 languageEnglish
Pages (from-to)5323-5328
Number of pages6
JournalNano letters
Volume14
Issue number9
DOIs
Publication statusPublished - Sep 10 2014

Keywords

  • CdSe quantum dot
  • dithiocarbamate
  • exciton delocalization
  • oscillator strength
  • radiative decay

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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