Electrochromic nanocrystal quantum dots

C. Wang, M. Shim, P. Guyot-Sionnest

Research output: Contribution to journalArticlepeer-review

Abstract

Incorporating nanocrystals into future electronic or optoelectronic devices will require a means of controlling charge-injection processes and an understanding of how the injected charges affect the properties of nanocrystals. We show that the optical properties of colloidal semiconductor nanocrystal quantum dots can be tuned by an electrochemical potential. The injection of electrons into the quantum-confined states of the nanocrystal leads to an electrochromic response, including a strong, size-tunable, midinfrared absorption corresponding to an intraband transition, a bleach of the visible interband exciton transitions, and a quench of the narrow band-edge photoluminescence.

Original languageEnglish (US)
Pages (from-to)2390-2392
Number of pages3
JournalScience
Volume291
Issue number5512
DOIs
StatePublished - Mar 23 2001
Externally publishedYes

ASJC Scopus subject areas

  • General

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