Nano Archive

Spin-polarizable excitonic luminescence in colloidal Mn2+-doped CdSe quantum dots

Beaulac, Remi and Archer, Paul I. and Liu, Xinyu and Lee, Sanghoon and Salley, G. Mackay and Dobrowolska, Margaret and Furdyna, Jacek K. and Gamelin, Daniel R. (2008) Spin-polarizable excitonic luminescence in colloidal Mn2+-doped CdSe quantum dots. NANO LETTERS, 8 (4). pp. 1197-1201.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl080195p

Abstract

The photoluminescence of colloidal Mn2+-doped CdSe nanocrystals has been studied as a function of nanocrystal diameter. These nanocrystals are shown to be unique among colloidal doped semiconductor nanocrystals reported to date in that quantum confinement allows tuning of the CdSe bandgap energy across the Mn2+ excited-state energies. At small diameters, the nanocrystal photoluminescence is dominated by Mn2+ emission. At large diameters, CdSe excitonic photoluminescence dominates. The latter scenario has allowed spin-polarized excitonic photoluminescence to be observed in colloidal doped semiconductor nanocrystals for the first time.

Item Type:Article
Subjects:Physical Science > Nano objects
Physical Science > Nanoelectronics
Physical Science > Quantum phenomena
ID Code:6268
Deposited By:IoN
Deposited On:07 Aug 2009 12:08
Last Modified:07 Aug 2009 12:08

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