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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
Uncontrolled Keywords:DILUTED MAGNETIC SEMICONDUCTORS; NANOCRYSTALS; SPECTROSCOPY
Subjects:Analytical Science > Microscopy and probe methods
Physical Science > Nanoelectronics
ID Code:5899
Deposited By:IoN
Deposited On:16 Sep 2009 11:05
Last Modified:16 Sep 2009 11:05

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