Time-resolved photoluminescence of CdSe/CdS/CdZnS colloidal quantum dots
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PAVLENKO, Vladimir; DOBYNDE, I.; BELOUSSOV, Igor; OZOL, Dmitry. Time-resolved photoluminescence of CdSe/CdS/CdZnS colloidal quantum dots. In: Physica E: Low-Dimensional Systems and Nanostructures. 2020, nr. 115, p. 0. ISSN -.
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Physica E: Low-Dimensional Systems and Nanostructures
Numărul 115 / 2020 / ISSN - /ISSNe 1386-9477

Time-resolved photoluminescence of CdSe/CdS/CdZnS colloidal quantum dots


DOI: 10.1016/j.physe.2019.113695
Pag. 0-0

Pavlenko Vladimir1, Dobynde I.1, Beloussov Igor1, Ozol Dmitry2
 
1 Institute of Applied Physics,
2 Moscow Institute of Physics and Technology
 
Disponibil în IBN: 4 octombrie 2019


Rezumat

The kinetics of a strongly nonequilibrium system of electrons and holes excited in QDs by a ~30 ps laser pulse are studied by a time-resolved photoluminescence method. The excitation of electrons near the 1Pe states and holes near the 1P3/2 states is used. Three bands of the transient photoluminescence spectra were identified, and the rise and decay of each of them was investigated. The complex picture of the time evolution of the bands is explained by the fast processes of cascade intraband relaxation and the Pauli exclusion principle. The durations of formation and decay for each of the photoluminescence bands are determined. 

Cuvinte-cheie
biexciton, Binding energy, exciton, photoluminescence, quantum dots