Frequency-dependent spontaneous emission rate from CdSe and CdTe nanocrystals: Influence of dark states

A. F. van Driel; G. Allan; C. Delerue; Peter Lodahl; W. L. Vos; D. Vanmaekelbergh

doi:10.1103/PhysRevLett.95.236804

Frequency-dependent spontaneous emission rate from CdSe and CdTe nanocrystals: Influence of dark states

A. F. van Driel, G. Allan, C. Delerue, Peter Lodahl, W. L. Vos, D. Vanmaekelbergh

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Abstract

We studied the rate of spontaneous emission from colloidal CdSe and CdTe nanocrystals at room temperature. The decay rate, obtained from luminescence decay curves, increases with the emission frequency in a supralinear way. This dependence is explained by the thermal occupation of dark exciton states at room temperature, giving rise to a strong attenuation of the rate of emission. The supralinear dependence is in agreement with the results of tight-binding calculations.

Original language	English
Journal	Physical Review Letters
Volume	95
Issue number	23
Pages (from-to)	236804
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.95.236804
Publication status	Published - 2005

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title = "Frequency-dependent spontaneous emission rate from CdSe and CdTe nanocrystals: Influence of dark states",

abstract = "We studied the rate of spontaneous emission from colloidal CdSe and CdTe nanocrystals at room temperature. The decay rate, obtained from luminescence decay curves, increases with the emission frequency in a supralinear way. This dependence is explained by the thermal occupation of dark exciton states at room temperature, giving rise to a strong attenuation of the rate of emission. The supralinear dependence is in agreement with the results of tight-binding calculations.",

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AU - van Driel, A. F.

AU - Allan, G.

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AU - Lodahl, Peter

AU - Vos, W. L.

AU - Vanmaekelbergh, D.

PY - 2005

Y1 - 2005

N2 - We studied the rate of spontaneous emission from colloidal CdSe and CdTe nanocrystals at room temperature. The decay rate, obtained from luminescence decay curves, increases with the emission frequency in a supralinear way. This dependence is explained by the thermal occupation of dark exciton states at room temperature, giving rise to a strong attenuation of the rate of emission. The supralinear dependence is in agreement with the results of tight-binding calculations.

AB - We studied the rate of spontaneous emission from colloidal CdSe and CdTe nanocrystals at room temperature. The decay rate, obtained from luminescence decay curves, increases with the emission frequency in a supralinear way. This dependence is explained by the thermal occupation of dark exciton states at room temperature, giving rise to a strong attenuation of the rate of emission. The supralinear dependence is in agreement with the results of tight-binding calculations.

U2 - 10.1103/PhysRevLett.95.236804

DO - 10.1103/PhysRevLett.95.236804

M3 - Journal article

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SP - 236804

JO - Physical Review Letters

JF - Physical Review Letters

IS - 23

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Frequency-dependent spontaneous emission rate from CdSe and CdTe nanocrystals: Influence of dark states

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