Luminescence Decay of Colloidal Quantum Dots and Stretched Exponential (Kohlrausch) Relaxation Function
The room temperature non-exponential luminescence decay of colloidal quantum dots is investigated theoretically in an attempt to identify the underlying physical mechanisms responsible for the shape of the decay. It is shown that a stretched exponential functional form of the luminescence decay can...
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| Veröffentlicht in: | Semiconductors (Woodbury, N.Y.) N.Y.), 2018-05, Vol.52 (5), p.587-589 |
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| container_title | Semiconductors (Woodbury, N.Y.) |
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| creator | Bodunov, E. N. Simões Gamboa, A. L. |
| description | The room temperature non-exponential luminescence decay of colloidal quantum dots is investigated theoretically in an attempt to identify the underlying physical mechanisms responsible for the shape of the decay. It is shown that a stretched exponential functional form of the luminescence decay can be understood in terms of long-range resonance energy transfer from quantum dots to acceptors (molecules, quantum dots, or anharmonic molecular vibrations) or by contact quenching by quenchers (surface traps, molecules or quantum dots) distributed statistically (Poisson distribution) on the surface of the dots. These non-radiative transition processes are assigned to different ranges of the stretching parameter β. |
| doi_str_mv | 10.1134/S1063782618050044 |
| format | Article |
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| source | Springer Nature - Complete Springer Journals |
| subjects | 2017. Nanostructure Characterization Anharmonicity DECAY ENERGY TRANSFER June 26–30 LUMINESCENCE Magnetic Materials Magnetism MATERIALS SCIENCE Physics Physics and Astronomy QUANTUM DOTS Russia Saint Petersburg TEMPERATURE RANGE 0273-0400 K XXV International Symposium “Nanostructures: Physics and Technology” |
| title | Luminescence Decay of Colloidal Quantum Dots and Stretched Exponential (Kohlrausch) Relaxation Function |
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