Bright upconversion luminescence and increased Tc in CaBi2Ta2O9:Er high temperature piezoelectric ceramics
Bright upconversion luminescence and increased Tc in CaBi2Ta2O9:Er high temperature piezoelectric ceramics
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DOI：
10.1063/1.4720578
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发表时间：
2012-05
影响因子：
3.2
通讯作者：
Dengfeng Peng;Xusheng Wang;Chao‐Nan Xu;X. Yao;Jian-hui Lin;Tiantuo Sun
中科院分区：
文献类型：
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作者：
Dengfeng Peng;Xusheng Wang;Chao‐Nan Xu;X. Yao;Jian-hui Lin;Tiantuo Sun
采用传统固相法合成了Er 3+掺杂CaBi 2 Ta 2 O 9（CBT）铋层状结构高温压电陶瓷。研究了Er 3+掺杂CBT陶瓷的上转换发光特性与Er 3+浓度和泵浦功率的关系。室温下，在980 nm激发下，获得了明亮的绿色上转换发光。观察到的强绿色和弱红色发射带分别对应于从4S 3/2和4F 9/2到4 I 15/2的跃迁。UC发射强度对泵浦功率的依赖关系表明UC发射涉及三光子过程。还进行了电介质随温度变化的研究。Er的引入提高了CBT的居里温度，因此，使这种陶瓷适用于更高温度下的传感器应用。该多功能高温压电陶瓷具有很强的上转换发光和较高的Tc，有望用于高温传感器、电子器件和电子器件等。
Er3+ doped CaBi2Ta2O9 (CBT) bismuth layered-structure high temperature piezoelectric ceramics were synthesized by the traditional solid state method. The upconversion (UC) emission properties of Er3+ doped CBT ceramics were investigated as a function of Er3+ concentration and incident pump power. A bright green upconverted emission was obtained under excitation 980 nm at room temperature. The observed strong green and weak red emission bands corresponded to the transitions from 4S3/2 and 4F9/2 to 4I15/2, respectively. The dependence of UC emission intensity on pumping power indicated that a three-photon process was involved in UC emissions. Studies of dielectric with temperature have also been carried out. Introduction of Er increased the Curie temperature of CBT, thus, making this ceramic suitable for sensor applications at higher temperatures. Because of its strong up-converted emission and increased Tc, the multifunctional high temperature piezoelectric ceramic may be useful in high temperature sensor,...