Effect of the PVA (polyvinyl alcohol) concentration on the optical properties of Eu-doped YAG phosphors

被引：16

作者：

Hora, Daniela A. ^{[1
]}

Andrade, Adriano B. ^{[1
]}

Ferreira, Nilson S. ^{[2
]}

Teixeira, Veronica C. ^{[3
]}

Rezende, Marcos V. dos S. ^{[4
]}

机构：

[1] Univ Fed Sergipe, Dept Fis, BR-49100000 Sao Cristovao, SE, Brazil

[2] Univ Fed Amapa, Dept Fis, BR-68902280 Macapa, AP, Brazil

[3] Ctr Nacl Pesquisa Energia & Mat, Lab Nacl Luz Sincrotron, POB 6192, BR-13084971 Campinas, SP, Brazil

[4] Univ Fed Sergipe, Dept Fis, GNF, BR-49500000 Itabaiana, SE, Brazil

来源：

OPTICAL MATERIALS | 2016年 / 60卷

关键词：

PVA based sol-gel; XEOL; Luminescence; Phosphors; Eu-doped YAG; SOL-GEL METHOD; LUMINESCENCE PROPERTIES; SPRAY-PYROLYSIS; LOW-TEMPERATURE; POWDERS; NANOPARTICLES; Y3AL5O12; ROUTE; PHOTOLUMINESCENCE; SUBSTITUTION;

D O I：

10.1016/j.optmat.2016.09.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of the polyvinyl alcohol (PVA) concentration on the synthesis and structural, morphological and optical properties of Y3Al5O13: Eu (Eu-doped YAG) was systematically investigated in this work. The final concentration of PVA in the preparation step influenced the crystallite size and also the degree of particle agglomeration in Eu-doped YAG phosphors. X-ray excited optical luminescence (XEOL) emission spectra results indicated typical Eu3+ emission lines and an abnormally intense D-5(0) -> F-7(4). The intensity parameters Omega(2) and Omega(4) were calculated and indicated the PVA concentration affects the ratio Omega(2):Omega(4). X-ray absorption spectroscopy (XAS) results showed Eu valence did not change and the symmetry around the Eu3+ is influenced by the PVA concentration. XEOL-XAS showed the luminescence increases as a function of energy. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：495 / 500

页数：6

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