Bright White Light Emission from Ultrasmall Cadmium Selenide Nanocrystals

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja300132p· OSTI ID:1049140

Rosson, Teresa ^[1]; Claiborne, Sarah ^[1]; McBride, James ^[1]; Stratton, Benjamin S ^[1]; Rosenthal, Sandra ^[2]

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1. Vanderbilt University
2. ORNL

A simple treatment method using formic acid has been found to increase the fluorescence quantum yield of ultrasmall white light-emitting CdSe nanocrystals from 8% to 45%. Brighter white-light emission occurs with other carboxylic acids as well, and the magnitude of the quantum yield enhancement is shown to be dependent on the alkyl chain length. Additionally, the nanocrystal luminescence remains enhanced relative to the untreated nanocrystals over several days. This brightened emission opens the possibility for even further quantum yield improvement and potential for use of these white-light nanocrystals in solid-state lighting applications.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1049140
• Journal Information: Journal of the American Chemical Society, Vol. 134, Issue 19; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CADMIUM SELENIDES
CARBOXYLIC ACIDS
CHAINS
FLUORESCENCE
FORMIC ACID
LUMINESCENCE