Luminescence Degradation Mechanisms in CdS/ZnSe Colloidal Nanocrystals

Autor:	A. V. Katsaba, S. A. Ambrozevich, M. S. Zabolotskii, A. G. Vitukhnovskii, R. B. Vasil’ev
Rok vydání:	2020
Předmět:	symbols.namesake Colloid Photoluminescence Auger effect Chemical bond Nanocrystal symbols Degradation (geology) Photodegradation Luminescence Photochemistry Electronic Optical and Magnetic Materials
Zdroj:	Bulletin of the Lebedev Physics Institute. 47:185-189
ISSN:	1934-838X 1068-3356
DOI:	10.3103/s1068335620060020
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::48350a2c4f92aea02d8841361cff4197 https://doi.org/10.3103/s1068335620060020 Zobrazit plný text záznamu Full text from SpringerLink