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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| URL | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.95.236804 |
| Authors | A. F. van Driel, G. Allan, C. Delerue, P. Lodahl, W. L. Vos, and D. Vanmaekelbergh |
| Year of publication | 2005 |
| Date published | 12/2005 |
| Journal | Phys. Rev. Lett. |
| Volume | 95 |
| Pages | 236804: 1-4 |
| DOI number | 10.1103/PhysRevLett.95.236804 |
| Keywords | CdSe, CdTe, dark states, nanocrystals, quantum dots, spontaneous emission |