Mixed vanadates: optimization of optical properties by varying chemical composition

0476808 - FZÚ 2018 RIV NL eng J - Článek v odborném periodiku
Levushkina, V. - Spassky, D. - Brik, M.G. - Zych, E. - Madej, A. - Belsky, A.N. - Bartosiewicz, Karol - Nikl, Martin
Mixed vanadates: optimization of optical properties by varying chemical composition.
Journal of Luminescence. Roč. 189, Sep (2017), s. 140-147. ISSN 0022-2313. E-ISSN 1872-7883
GRANT EU: European Commission(XE) 316906 - LUMINET
Institucionální podpora: RVO:68378271
Klíčová slova: yttrium vanadate * energy-transfer * single-crystals * YVO₄ crystals * doped YVO₄ * luminescence * growth * scintillator * LuVO₄ * improvement
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.732, rok: 2017

Mixed LuxY1-xVO4 crystals, undoped and doped with Eu3+, were synthetized by the solid state reaction method. The crystal structure and phase composition were controlled by the X-ray diffraction (XRD), Raman analysis, and scanning electron microscope (SEM) measurements. The samples' crystallinity was improved by annealing. Nevertheless, the lattice distortion caused by the substitution of Y by Lu was detected. The lattice parameters derived from the XRD data are in good agreement with the calculated ones. It was found that the luminescence intensity increase in the annealed samples is related to the improvement of crystallinity of samples. According to the studies of X-ray excited luminescence at 300 K the relative luminescence intensity increases for the samples with intermediate values of x. For the LuxY(1-x)VO(4):Eu3+ the highest luminescence intensity was detected for x=0.7 and ascribed to the effect of decrease of the mean distance between the thermalized electrons and holes.
Trvalý link: http://hdl.handle.net/11104/0273225