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
收藏
页码：495 / 500
页数：6
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