Upconversion luminescence and ferroelectric properties of Er³⁺ doped Bi₄Ti₃O₁₂-SrBi₄Ti₄O₁₅

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• 作者：T. Wei ; C.P. Li ; Q.J. Zhou ; Y.L. Zou ; L.S. Zhang
• 关键词：Ceramics ; Luminescence ; Ferroelectrics
• 刊名：Materials Letters
• 出版年：1 March, 2014
• 年：2014
• 卷：118
• 期：Complete
• 页码：92-95
• 全文大小：623 K

文摘

Er³⁺ doped intergrowth Bi₄Ti₃O₁₂-SrBi₄Ti₄O₁₅ (BIT-SBTi: xEr³⁺) ceramics have been synthesized by a solid state processing. Upconversion (UC) luminescence and ferroelectric (FE) polarization properties were first investigated. Bright UC green emission, originating from (²H_11/2,⁴S_3/2)-⁴I_15/2 transitions, was confirmed to be a two-photon energy transfer process by pumping laser power dependence of emission intensity. The UC green luminescence can be seen by the naked eye at room temperature. Furthermore, it is found that a proper Er³⁺ doping can also remarkably enhance the FE polarization of BIT-SBTi: xEr³⁺. The results indicated that BIT-SBTi: xEr³⁺ with good UC emission and high FE polarization can act as a potentially multifunctional optical-electro-material.