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A series of luminescent Ba0.79Al10.9O17.14:xEu (x = 0.005-0.12) phosphors were prepared by high-temperature solid-state reaction in air atmosphere. The coexistence of Eu2+ and Eu3+ was observed and verified by photoluminescence (PL) and photoluminescence excitation (PLE) spectra, X-ray photoelectron spectra (XPS), and diffuse reflection spectra. The band emission peaking at 430 nm was assigned to 4F65D-4F7 transition of Eu2+, and another four emissions peaking at 589, 619, 655, and 704 nm were attributed to 4F-4F transitions of 5D0-7FJ (J = 1, 2, 3, 4) of Eu3+. The related mechanism of self-reduction was discussed in detail. The color of the Ba0.79Al10.9O17.14:xEu phosphors could be shifted from blue (0.23, 0.10) to red (0.42, 0.27) by doping Li+ ions, and the temperature dependence properties were investigated.


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Color tunable Ba0.79Al10.9O17.14:xEu phosphor prepared in air via valence state control

Show Author's information Ziyao WANGaYangai LIUa( )Jian CHENaMinghao FANGaZhaohui HUANGaLefu MEIa
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China

Abstract

A series of luminescent Ba0.79Al10.9O17.14:xEu (x = 0.005-0.12) phosphors were prepared by high-temperature solid-state reaction in air atmosphere. The coexistence of Eu2+ and Eu3+ was observed and verified by photoluminescence (PL) and photoluminescence excitation (PLE) spectra, X-ray photoelectron spectra (XPS), and diffuse reflection spectra. The band emission peaking at 430 nm was assigned to 4F65D-4F7 transition of Eu2+, and another four emissions peaking at 589, 619, 655, and 704 nm were attributed to 4F-4F transitions of 5D0-7FJ (J = 1, 2, 3, 4) of Eu3+. The related mechanism of self-reduction was discussed in detail. The color of the Ba0.79Al10.9O17.14:xEu phosphors could be shifted from blue (0.23, 0.10) to red (0.42, 0.27) by doping Li+ ions, and the temperature dependence properties were investigated.

Keywords:

tunable, phosphor, Ba0.79Al10.9O17.14, luminescence, self-reduction
Received: 24 December 2016 Revised: 26 February 2017 Accepted: 27 February 2017 Published: 06 May 2017 Issue date: June 2017
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Publication history
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Publication history

Received: 24 December 2016
Revised: 26 February 2017
Accepted: 27 February 2017
Published: 06 May 2017
Issue date: June 2017

Copyright

© The author(s) 2017

Acknowledgements

We thank the National Natural Science Foundation of China (Grant No. 51472223), the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No. CET-12-0951), and the Fundamental Research Funds for Central Universities (Grant No. 2652015090).

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