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Applied Physics Letters / Volume 93 / Issue 8 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 93, 083114 (2008); http://dx.doi.org/10.1063/1.2970995 (3 pages)

Dilution effects on the photoluminescence of ZnSe quantum-dot dispersions

Bing C. Mei1, Jun Wang1, Qi Qiu1, Tracy Heckler1, Athos Petrou2, and T. J. Mountziaris1

1Department of Chemical Engineering and UMass NanoMedicine Institute, University of Massachusetts, Amherst, Massachusetts 01003, USA
2Department of Physics, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA

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(Received 12 June 2008; accepted 26 July 2008; published online 27 August 2008)

We report results for the photoluminescence emission intensity from ZnSe quantum-dot dispersions in liquids as a function of particle concentration. The observed emission intensity initially increases with dilution, exhibits a maximum, and then decreases. The optimal particle concentration yielding the maximum emission intensity increases as the particle size decreases. The corresponding optimal interparticle distance was estimated for three quantum-dot populations having different average particle size. The observed behavior depends on fundamental physical interactions between the exciting and emitted radiation and the quantum dots; it is expected to be valid for any quantum-dot dispersion, irrespective of material type.

© 2008 American Institute of Physics

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KEYWORDS and PACS

Keywords

II-VI semiconductors, particle size, photoluminescence, semiconductor quantum dots, zinc compounds

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2970995

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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