Frequency-Dependent Spontaneous Emission Rate from CdSe and CdTe Nanocrystals: Influence of Dark States
- 1 December 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 95 (23) , 236804
- https://doi.org/10.1103/physrevlett.95.236804
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.Keywords
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This publication has 31 references indexed in Scilit:
- Controlling the dynamics of spontaneous emission from quantum dots by photonic crystalsNature, 2004
- Light Emission and Amplification in Charged CdSe Quantum DotsThe Journal of Physical Chemistry B, 2004
- NanostructuresPublished by Springer Nature ,2004
- Electroluminescence from single monolayers of nanocrystals in molecular organic devicesNature, 2002
- A Quantum Dot Single-Photon Turnstile DeviceScience, 2000
- Semiconductor Nanocrystals as Fluorescent Biological LabelsScience, 1998
- Quantum Dot Bioconjugates for Ultrasensitive Nonisotopic DetectionScience, 1998
- Band-edge exciton in quantum dots of semiconductors with a degenerate valence band: Dark and bright exciton statesPhysical Review B, 1996
- Excitonic optical nonlinearity and exciton dynamics in semiconductor quantum dotsPhysical Review B, 1987
- Electron–electron and electron-hole interactions in small semiconductor crystallites: The size dependence of the lowest excited electronic stateThe Journal of Chemical Physics, 1984