Ultrafast charge separation at CdS quantum dot/rhodamine B molecule interface

Abdelaziz Boulesbaa, Abey Issac, Dave Stockwell, Zhuangqun Huang, Jier Huang, Jianchang Guo, Tianquan Lian*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

191 Citations (Scopus)

Abstract

Ultrafast dissociation of excitons in CdS quantum dots via electron transfer to adsorbed rhodamine B (RhB) molecules was demonstrated. The rate of electron transfer can be controlled by the number of adsorbates attached on the nanoparticle and transfer time as fast as 12 picoseconds was observed. The rapid and controllable charge separation in this model quantum dot-adsorbate complex provides a potential approach for separating multiple excitons before the exciton-exciton annihilation process.

Original languageEnglish
Pages (from-to)15132-15133
Number of pages2
JournalJournal of the American Chemical Society
Volume129
Issue number49
DOIs
Publication statusPublished - Dec 12 2007

ASJC Scopus subject areas

  • Chemistry(all)

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