Core-Shell ZnO:Ga-SiO.sub.2./sub. nanocrystals: limiting particle agglomeration and increasing luminescence via surface defect passivation

Procházková, Lenka; Vaněček, V.; Čuba, V.; Pjatkan, R.; Martinez-Turtos, R.; Jakubec, Ivo; Buryi, Maksym; Omelkov, S.; Auffray, E.; Lecoq, P.; Mihóková, Eva; Nikl, Martin

doi:https://dx.doi.org/10.1039/C9RA04421C

Number of the records: 1

Core-Shell ZnO:Ga-SiO.sub.2./sub. nanocrystals: limiting particle agglomeration and increasing luminescence via surface defect passivation

1.

SYSNO ASEP	0517113
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Core-Shell ZnO:Ga-SiO₂ nanocrystals: limiting particle agglomeration and increasing luminescence via surface defect passivation
Author(s)	Procházková, Lenka (FZU-D) Vaněček, V. (CZ) Čuba, V. (CZ) Pjatkan, R. (CZ) Martinez-Turtos, R. (IT) Jakubec, Ivo (UACH-T)_{SAI, RID, ORCID} Buryi, Maksym (FZU-D)_{RID, ORCID} Omelkov, S. (EE) Auffray, E. (CH) Lecoq, P. (CH) Mihóková, Eva (FZU-D)_{RID, ORCID, SAI} Nikl, Martin (FZU-D)_{RID, ORCID, SAI}
Number of authors	12
Source Title	RSC Advances. - : Royal Society of Chemistry Roč. 9, č. 50 (2019), s. 28946-28952
Number of pages	7 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	ZnO ; SiO₂ ; nanoparticles ; luminescence
Subject RIV	BM - Solid Matter Physics ; Magnetism
OECD category	Condensed matter physics (including formerly solid state physics, supercond.)
Subject RIV - cooperation	Institute of Inorganic Chemistry - Inorganic Chemistry
R&D Projects	GA17-06479S GA ČR - Czech Science Foundation (CSF)
	EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Open access
Institutional support	FZU-D - RVO:68378271 ; UACH-T - RVO:61388980
UT WOS	000487104200006
EID SCOPUS	85072562581
DOI	10.1039/C9RA04421C
Annotation	Heat treatment is needed to increase the luminescence intensity of ZnO:Ga particles, but it comes at the cost of higher particle agglomeration. Higher agglomeration results in low transparency of scintillating powder when embedded in a matrix and constitutes one of the biggest disadvantages, besides low light yield and low stopping power, of ZnO:Ga powder. Limiting ZnO:Ga particle size is therefore a key step in order to prepare highly luminescent and transparent composites with prospects for optical applications. In this work, SiO2 coating was successfully used to improve luminescence intensity or limitation of crystallite size growth during further annealing. Furthermore, ZnO:Ga and ZnO:Ga-SiO2 core–shells were embedded in a polystyrene matrix.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2020
Electronic address	http://hdl.handle.net/11104/0302400

Number of the records: 1