Bi3+共掺和能量传递对BaY2Si3O10: Eu3+发光的调制和影响

J4 ›› 2014, Vol. 31 ›› Issue (6): 641-647.

• 光谱 • 下一篇

Bi3+共掺和能量传递对BaY2Si3O10: Eu3+发光的调制和影响

崔跃鹏¹,胡正发¹,叶定华²,张伟²,盛霞²,³,罗莉¹,王银海³

广东工业大学物理与光电工程学院，广东广州 510006

收稿日期:2014-03-11 修回日期:2014-05-14 出版日期:2014-11-28 发布日期:2014-11-17
通讯作者: 胡正发 (1972- ),博士,从事发光材料和器件以及光电子应用研究。 E-mail:zhfhu@gdut.edu.cn
作者简介:崔跃鹏 (1987- ) 内蒙古赤峰人, 研究生, 从事发光材料及光学设计相关研究。E-mail: 664990351@qq.com
基金资助:
国家自然科学基金(21271048) 和广东省重大科技专项(2011A080801015) 资助

Modulation and enhancement of luminescence of BaY2Si3O10: Eu3+ phosphor through energy transfer by Bi3+co-doping

CUI Yue-peng，HU Zheng-fa*, YE Ding-hua, ZHANG Wei*, SHENG Xia, LUO Li, WANG Yin-hai

School of Physics and Optoelectronic Engineering, Guangdong University of Technology,Guangzhou 510006， China

Received:2014-03-11 Revised:2014-05-14 Published:2014-11-28 Online:2014-11-17

摘要/Abstract

摘要： 荧光粉BaY2Si3O10: Bi3+, Eu3+经高温固相法制备并由X-ray衍射谱仪分析其物相结构。实验结果显示Bi3+共掺下BaY2Si3O10: Eu3+的激发光谱呈现一个有明显增强的宽电荷转移带和系列Eu3+的 f – f 窄吸收峰，发射谱为Eu3+的5D0-7FJ橙-红光发射。当用285 nm 紫外光激发时，Bi3+到Eu3+间存在有效的能量传递，导致Bi3+的宽带紫外发射(中心345 nm)强度减弱，而Eu3+的橙-红光发射显著增强；随着Eu3+浓度的增加，能量传递效率也随之提高。最佳Eu3+浓度为0.4摩尔百分比，此后荧光粉发射强度发生浓度猝灭。结果表明Bi3+共掺时明显改善和提升荧光粉在电荷转移带(200 – 350 nm)的激发效率。Bi3+到Eu3+间主要的能量传递机制是通过四极–四极相互作用实现，并且能量传递的临界作用距离是1.604 nm

关键词: 材料, 荧光粉, 高温固相法, Bi3+,Eu3+共掺, BaY2Si3O10

Abstract: Phosphors BaY2Si3O10: Bi3+(Eu3+) were synthesized by solid – state reaction method. Their phase and optical properties were analysed by using X-ray powder diffractionmeter and fluorescence spectrometer, respectively. The photoluminescence excitation (PLE) spectra of BaY2Si3O10: Eu3+ consist of an enhanced broad charge transfer band (CTB) ranged 200-350 nm from O2– to Eu3+, and the 5D0 ? 7FJ (J=1 centered at 592 nm orange, J=2 at 615 nm red) transitions of Eu3+ present the typical orange-red emission band. When phosphors were excited by 285 nm light, the spectral overlap of emission band of Bi3+ and excitation spectra of Eu3+ demonstrated the energy transfer from Bi3+ to Eu3+ that positively enhance the orange-red luminescence of Eu3+ in BaY2Si3O10: Eu3+. The optimized doping is 0.08 mol% for Bi3+ and 0.4 mol% for Eu3+. The critical transfer distance was calculated to be 1.604 nm, and the concentration quenching mechanism was mainly due to the electric quadrapole – quadrapole interactions.

Key words: Materials, Phosphor, High temperature solid-state reaction, Bi3+,Eu3+ co-coped, BaY2Si3O10

崔跃鹏胡正发叶定华张伟盛霞罗莉王银海. Bi3+共掺和能量传递对BaY2Si3O10: Eu3+发光的调制和影响[J]. J4, 2014, 31(6): 641-647.

CUI Yue-peng，HU Zheng-fa*, YE Ding-hua, ZHANG Wei*, SHENG Xia, LUO Li, WANG Yin-hai. Modulation and enhancement of luminescence of BaY2Si3O10: Eu3+ phosphor through energy transfer by Bi3+co-doping[J]. J4, 2014, 31(6): 641-647.

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Bi3+共掺和能量传递对BaY2Si3O10: Eu3+发光的调制和影响

Modulation and enhancement of luminescence of BaY2Si3O10: Eu3+ phosphor through energy transfer by Bi3+co-doping

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