(Bi0.5Na0.5)TiO3:Sm3+无铅压电陶瓷的红光发射特性

doi:10.15541/jim20130599

无机材料学报 ›› 2014, Vol. 29 ›› Issue (8): 851-854.DOI: 10.15541/jim20130599

(Bi_0.5Na_0.5)TiO₃:Sm³⁺无铅压电陶瓷的红光发射特性

孙海勤^1,2, 张涛¹, 张奇伟^1,2, 张胤¹

(1. 内蒙古科技大学材料与冶金学院, 包头014010; 2. 同济大学功能材料研究所, 上海 200092)

收稿日期:2013-11-18 修回日期:2014-01-12 出版日期:2014-08-20 网络出版日期:2014-07-15
作者简介:孙海勤(1982–), 女, 讲师. E-mail: a8082sz@imust.edu.cn
基金资助:
内蒙古科技大学创新基金(2012NCL006, 2012NCL002);中国博士后科学基金(2013M540384);Innovation Funds of Inner Mongolia University of Science & Technolygy (2012NCL006, 2012NCL002);National Science Foundation for Post-doctoral Scientists of China (2013M540384)

Red Emission Properties for (Bi_0.5Na_0.5)TiO₃:Sm³⁺ Lead-free Piezoelectrics

SUN Hai-Qin^1,2, ZHANG Tao¹, ZHANG Qi-Wei^1,2, ZHANG Yin¹

(1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China; 2. Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China)

Received:2013-11-18 Revised:2014-01-12 Published:2014-08-20 Online:2014-07-15
About author:SUN Hai-Qin. E-mail: a8082sz@imust.edu.cn

摘要/Abstract

摘要：

采用传统的固相反应烧结方法制备了稀土Sm³⁺掺杂的(Bi_0.5Na_0.5)TiO₃无铅压电陶瓷。系统分析了掺杂浓度、烧结温度和离子补偿对发光特性的影响。稀土Sm³⁺离子的加入实现了(Bi_0.5Na_0.5)TiO₃陶瓷的红绿光发射, 其激发光波段位于400~500 nm范围内, 与已经成熟的蓝光LED芯片的发射光谱充分匹配。当烧结温度为1100℃, Sm³⁺离子的掺杂浓度为0.015 mol时, 陶瓷样品呈现最强的发光强度。同时, 通过Li⁺、Na⁺、K⁺离子进行电荷补偿, 有效提高了陶瓷样品的发光性能, 发光强度随离子半径增大而增强。可见, Sm³⁺掺杂的(Bi_0.5Na_0.5)TiO₃材料在光电集成器件中具有很好的应用前景。

关键词: 无铅压电陶瓷, 蓝光LED, 多功能材料

Abstract:

Sm³⁺ doped (Bi_0.5Na_0.5)TiO₃ lead-free piezoelectric ceramics were fabricated by the conventional solid-state reaction method. Phase and crystallinity of the synthesized materials were investigated by X-ray diffraction (XRD). The influences of the Sm³⁺dopant concentration, sintering temperature and charge compensation on photoluminescence properties were systematically investigated. The results showed that the (Bi_0.5Na_0.5)TiO₃ ceramics realized red-green emission by additives of Sm³⁺ ions, and the excitation bands were well adaptable to the emission band of commercial blue light-emitting diodes. The emission intensities were strongly dependent on the dopant concentration and sintering temperature with the optimal value at 0.015 mol and 1100℃ , respectively. The enhanced luminescence was observed for the Li⁺, Na⁺ and K⁺ doped compositions as compensators compared to the host matrix with only Sm³⁺ ions, indicating that host activator energy transfer of Sm³⁺ could be responsible for this enhancement. Among the compensators of Li⁺, Na⁺ and K⁺ ions, the K⁺ compensated (Bi_0.5Na_0.5)TiO₃-Sm³⁺ samples showed the remarkable improvement in photoluminescence properties. Hence, the Sm³⁺ doped (Bi_0.5Na_0.5)TiO₃ ceramics as a multifunctional material may have significantly technological promise for optical-electro integration devices.

Key words: lead-free piezoelectric ceramics, blue light-emitting diodes (LED), multifunctional material

中图分类号:

TQ174

孙海勤, 张涛, 张奇伟, 张胤. (Bi_0.5Na_0.5)TiO₃:Sm³⁺无铅压电陶瓷的红光发射特性[J]. 无机材料学报, 2014, 29(8): 851-854.

SUN Hai-Qin, ZHANG Tao, ZHANG Qi-Wei, ZHANG Yin. Red Emission Properties for (Bi_0.5Na_0.5)TiO₃:Sm³⁺ Lead-free Piezoelectrics[J]. Journal of Inorganic Materials, 2014, 29(8): 851-854.

图/表 6

图1 (Bi0.5Na0.5)1-xSmxTiO3体系陶瓷样品在的XRD图谱

Fig. 1 XRD patterns of (Bi0.5Na0.5)1-xSmxTiO3 ceramics

图2 BNT:0.015Sm3+陶瓷样品的激发和发射光谱图

Fig. 2 Room temperature PL and PLE spectra of BNT:0.015Sm3+ ceramic Inset is the energy level diagram of Sm3+

图3 不同Sm3+掺杂量BNT样品的发射光谱图

Fig. 3 PL spectra of BNT:xSm3+ with different concentrations of Sm3+ Inset is the emission intensity vs Sm3+ concentrations

图4 不同温度烧结得到的BNT:0.015Sm3+样品的PL发射谱

Fig. 4 PL spectra of BNT:0.015Sm3+ sintered at different temperatures Inset is the relationship between emission intensity and sintering temperature

图5 不同温度烧结得到的BNT:0.015Sm3+样品的XRD图谱

Fig. 5 XRD patterns of BNT:0.015Sm3+ samples sintered at different temperatures

图6 (Bi0.5Na0.5)1-2xSmxMxTiO3 (x=0.015, M= Li、Na、K)样品的发射光谱

Fig. 6 Room temperature PL spectra of (Bi0.5Na0.5)1-2xSmxMxTiO3 (x=0.015, M= Li, Na, K) samples

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(Bi_0.5Na_0.5)TiO₃:Sm³⁺无铅压电陶瓷的红光发射特性

Red Emission Properties for (Bi_0.5Na_0.5)TiO₃:Sm³⁺ Lead-free Piezoelectrics

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