论文成果
Study on synthesis, optimization and concentration quenching mechanism of deep-blue-emitting BaNa(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>:Eu<sup>2+</sup>phosphor
- 发布时间：2023-10-19
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- 关键字：Europium compounds;Barium compounds - Color - Crystal structure - Europium - Light emission - Phosphors - Photoluminescence - Quenching - Sodium compounds - Solid state reactions - Supercomputers - X ray diffraction;Borate - Chromaticity coordinates - Deep blue - Photoluminescence emission - Photoluminescence excitation - Photoluminescence properties - Quadrupole interactions - Solid state reaction method
- 摘要：A series of deep-blue Ba<inf>(1-x)</inf>Na(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>: xEu<sup>2+</sup>(x = 0.06, 0.07, 0.08, 0.09, 0.10) phosphors have been synthesized by solid state reaction method. The crystal structure and photoluminescence properties were investigated by X-ray diffraction (XRD), photoluminescence excitation (PLE) and photoluminescence emission (PL) spectra. The photoluminescence properties of BaNa(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>: Eu<sup>2+</sup>phosphor were optimized by varying the doping concentration of Eu<sup>2+</sup>ions, and the concentration quenching mechanism was studied in detail. Also the color purity and color stability of Ba<inf>(1-x)</inf>Na(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>: xEu<sup>2+</sup>phosphors were evaluated by calculating the CIE chromaticity coordinates. The BaNa(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>: Eu<sup>2+</sup>phosphor shows a broad excitation band ranging from 200 to 380 nm when monitored at 405 nm and a strong deep-blue emission band peaked at 405 nm when excited at 285 or 310 nm. The optimal concentration of Eu<sup>2+</sup>in BaNa(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>: Eu<sup>2+</sup>phosphor is about 7.0 mol%. The concentration quenching mechanism of Eu<sup>2+</sup>in the BaNa(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>host was verified to be quadrupole-quadrupole interaction. The chromaticity coordinates of Ba<inf>0.93</inf>Na(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>: 0.07Eu<sup>2+</sup>is located in the deep-blue light region and Ba<inf>(1-x)</inf>Na(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>: xEu<sup>2+</sup>phosphors show high color purity and good color stability. All the results indicate that BaNa(B<inf>3</inf>O<inf>5</inf>)<inf>3</inf>: Eu<sup>2+</sup>could act as a good deep-blue phosphor. © 2017 Elsevier GmbH
- 卷号：154
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