Emission tunability and local environment in europium-doped OH--free calcium aluminosilicate glasses for artificial lighting applications

被引：23

作者：

Farias, Aline M. ^{[1
]}

Sandrini, Marcelo ^{[1
]}

Viana, Jose Renato M. ^{[1
]}

Baesso, Mauro L. ^{[1
]}

Bento, Antonio C. ^{[1
]}

Rohling, Jurandir H. ^{[1
]}

Guyot, Yannick ^{[2
]}

De Ligny, Dominique ^{[3
]}

Nunes, Luiz Antonio O. ^{[4
]}

Gandra, Flavio G. ^{[5
]}

Sampaio, Juraci A. ^{[6
]}

Lima, Sandro M. ^{[7
]}

Andrade, Luis Humberto C. ^{[7
]}

Medina, Antonio N. ^{[1
]}

机构：

[1] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, PR, Brazil

[2] Univ Lyon 1, Univ Lyon, CNRS, Lab Phys Chim Mat,UMR 5620, F-69622 Villeurbanne, France

[3] Univ Erlangen Nurnberg, Dept Mat Sci & Engn, D-91058 Erlangen, Germany

[4] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP, Brazil

[5] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP, Brazil

[6] Univ Estadual Norte Fluminense, Lab Ciencias Fis, BR-28013602 Campos Dos Goytacazes, RJ, Brazil

[7] Univ Estadual Mato Grosso Sul UEMS, Grp Espect Opt & Fototerm, BR-79804970 Dourados, MS, Brazil

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2015年 / 156卷

关键词：

Glasses; Luminescence; Optical properties; XAFS (EXAFS and XANES); Photoluminescence spectroscopy; Visible and ultraviolet spectrometers; ELECTRON-PARAMAGNETIC-RES; RARE-EARTH IONS; SPECTROSCOPIC PROPERTIES; LUMINESCENCE PROPERTIES; LASER-EMISSION; EU2+; RESONANCE; SPECTRA; PHOSPHOR; EU3+;

D O I：

10.1016/j.matchemphys.2015.03.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The relationship between emission tunability and the local environment of europium ions in OH--free calcium aluminosilicate glasses was investigated, focusing on the development of devices for artificial lighting. Significant conversion of Eu3+ to Eu2+ was obtained by means of melting the glasses under a vacuum atmosphere and controlling the silica content, resulting in broad, intense, and tunable luminescence ranging from blue to red. Electron spin resonance and X-ray absorption near edge structure measurements enabled correlation of the luminescence behavior of the material with the Eu2+/Eu3+ concentration ratio and changes in the surrounding ions' crystal field. The coordinates of the CIE 1931 chromaticity diagram were calculated from the spectra, and the contour maps showed that the light emitted from Eu2+ presented broad bands and enhanced color tuning, ranging from reddish-orange to blue. The results showed that these Eu doped glasses can be used for tunable white lighting by combining matrix composition and the adjustment of the pumping wavelength. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：214 / 219

页数：6

共 34 条

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