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Materials 2011, 4(7), 1182-1193; doi:10.3390/ma4071182
Article

Experimental Determination of the Fluorescence Quantum Yield of Semiconductor Nanocrystals

1,2
, 1,2
, 1,2
, 3
, 1,2
, 1,2,* , 1,2
, 3
 and 1,2
1 Université Pierre et Marie Curie-Paris 6, UMR 7588, INSP, 4 place Jussieu, PARIS cedex 05, France 2 CNRS, UMR7588, INSP, Paris cedex 05, France 3 Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Cau giay Dist. Hanoi 71000, Vietnam
* Author to whom correspondence should be addressed.
Received: 30 April 2011 / Revised: 23 June 2011 / Accepted: 27 June 2011 / Published: 30 June 2011
(This article belongs to the Special Issue Luminescent Materials)
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Abstract

Many studies have considered the luminescence of colloidal II–VI nanocrystals, both in solution at a collective scale and at an individual scale by confocal microscopy. The quantum yield is an important figure of merit for the optical quality of a fluorophore. We detail here a simple method to determine the quantum yield of nanocrystals in solution as a function of the absorption. For this purpose, we choose rhodamine 101 as a reference dye to measure the nanocrystal fluorescence quantum yield. The influence of the concentration on quantum yield is therefore studied for both the reference and the solutions of nanocrystals and is found to be critical for the acuity of the method. Different types of nanocrystals are studied to illustrate different quantum yield evolutions with the concentration.
Keywords: colloidal nanocrystals; fluorescence; quantum yield colloidal nanocrystals; fluorescence; quantum yield
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Laverdant, J.; Marcillac, W.D.; Barthou, C.; Chinh, V.D.; Schwob, C.; Coolen, L.; Benalloul, P.; Nga, P.T.; Maître, A. Experimental Determination of the Fluorescence Quantum Yield of Semiconductor Nanocrystals. Materials 2011, 4, 1182-1193.

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