KBaPO4,Tb3+材料制备及其发光特性

doi:10.3724/SP.J.1077.2011.00503

无机材料学报 ›› 2011, Vol. 26 ›› Issue (5): 503-507.DOI: 10.3724/SP.J.1077.2011.00503

KBaPO₄,Tb³⁺材料制备及其发光特性

王志军, 李盼来, 杨志平, 郭庆林

(河北大学物理科学与技术学院, 保定 071002)

收稿日期:2010-07-05 修回日期:2010-08-30 出版日期:2011-05-20 网络出版日期:2011-06-07
作者简介:王志军(1979-), 女, 硕士, 讲师. E-mail: wangzhijunmail@yahoo.com.cn
基金资助:
国家自然科学基金(50902042); 河北省自然科学基金(E2009000209, E2010000283); 河北省教育厅基金(2009313)

Preparation and Luminescent Characteristics of KBaPO₄,Tb³⁺ Phosphor

WANG Zhi-Jun, LI Pan-Lai, YANG Zhi-Ping, GUO Qing-Lin

(College of Physics Science and Technology, Hebei University, Baoding 071002, China)

Received:2010-07-05 Revised:2010-08-30 Published:2011-05-20 Online:2011-06-07
Supported by:
National Natural Science Foundation of China (50902042); Natural Science Foundation of Hubei Province (E2009000209, E2010000283); Research Foundation of Education Bureau of Hebei Province (2009313)

摘要/Abstract

摘要： 采用高温固相法合成了KBaPO₄:Tb³⁺绿色发光荧光粉, 并研究了材料的发光性质. KBaPO₄:Tb³⁺材料呈多峰发射, 发射峰位于437、490、545、586和622 nm, 分别对应Tb³⁺的⁵D₃→⁷F₄和⁵D₄→⁷F_J =6, 5, 4, 3跃迁发射, 主峰为545 nm; 监测545 nm发射峰, 所得激发光谱由4f⁷-5d¹的宽带吸收(200~330 nm)和4f-4f电子吸收(330~400 nm)组成, 主峰为380 nm. 研究了Tb³⁺掺杂浓度, 电荷补偿剂Li⁺、Na⁺、K⁺和Cl^-, 及敏化剂Ce³⁺对KBaPO₄:Tb³⁺材料发射强度的影响. 结果显示, 调节激活剂浓度、添加电荷补偿剂或敏化剂均可在很大程度上提高材料的发射强度. 上述结果表明KBaPO₄: Tb³⁺材料是一种很好的近紫外光激发型高效绿色发光荧光粉.

关键词: 白光LED, KBaPO₄,Tb³⁺, 发光特性

Abstract: A green phosphor, KBaPO₄:Tb³⁺, was synthesized by the high temperature solid-state method, using Li₂CO₃, Na₂CO₃, K₂CO₃, BaCO₃, NH₄H₂PO₄, NH₄Cl, Tb₄O₇ and CeO₂as starting materials. After these individual materials were blended and grounded thoroughly in an agate mortar, the homogeneous mixture was heat-treated at 950℃ for 3 h, and the phosphors were obtained. The samples was characterized by powder X-ray diffraction (XRD) (D/max-rA, Cu Ka, 40 kV, 40 mA, λ=0.15406 nm). The spectral characteristics of these phosphors were measured by a SHIMADZU RF-540 fluorescence spectrophotometer. KBaPO4:Tb3+ phosphor shows several emission peaks located at 437, 490, 545, 586 and 622 nm which correspond to the ⁵D₃→⁷F₄ and ⁵D₄→⁷F_J=6. 5, 4, 3 transition of Tb³⁺, respectively, and the highest emission peak is 545 nm. Monitored at 545 nm emission, the excitation spectrum consists of several bands, and the highest peak locates at 380 nm. The effects of Tb³⁺ doping content, the compensators (Li⁺, Na⁺, K⁺ or Cl^-), and the sensitize activator Ce³⁺ on the emission intensity of KBaPO₄: Tb³⁺ phosphor are studied. The results show that the emission intensity can be controlled by the above factors, and the intensity can be enhanced by the selection of the optimal condition. It indicates that KBaPO₄:Tb³⁺ is a promising green phosphor for white light emitting diodes.

Key words: white LED, KBaPO₄,Tb³⁺, luminescent characteristics

中图分类号:

O614
O482

王志军, 李盼来, 杨志平, 郭庆林. KBaPO₄,Tb³⁺材料制备及其发光特性[J]. 无机材料学报, 2011, 26(5): 503-507.

WANG Zhi-Jun, LI Pan-Lai, YANG Zhi-Ping, GUO Qing-Lin. Preparation and Luminescent Characteristics of KBaPO₄,Tb³⁺ Phosphor[J]. Journal of Inorganic Materials, 2011, 26(5): 503-507.

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KBaPO₄,Tb³⁺材料制备及其发光特性

Preparation and Luminescent Characteristics of KBaPO₄,Tb³⁺ Phosphor

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