Luminescence Degradation Mechanisms in CdS/ZnSe Colloidal Nanocrystals
The results of the study of one-photon processes of optically induced degradation of photoluminescence intensity of CdS/ZnSe nanocrystals are presented, and mechanisms of this degradation are determined. It is shown that the nanocrystal photodegradation process consists of three components. The firs...
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Published in | Bulletin of the Lebedev Physics Institute Vol. 47; no. 6; pp. 185 - 189 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Moscow
Pleiades Publishing
01.06.2020
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | The results of the study of one-photon processes of optically induced degradation of photoluminescence intensity of CdS/ZnSe nanocrystals are presented, and mechanisms of this degradation are determined. It is shown that the nanocrystal photodegradation process consists of three components. The first degradation component is caused by Auger recombination activation in photoinduced hole trapping by the trap associated with a surface state; a long-term degradation component can be associated with thermally activated chemical bond breaking between a passivating ligand, i.e., oleic acid, and the nanocrystal surface followed by nonradiative recombination channel activation. |
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ISSN: | 1068-3356 1934-838X |
DOI: | 10.3103/S1068335620060020 |