4.Er3+掺杂Bi3Ti0.98Ta0.02Nb0.98W0.02O9铁电陶瓷的上转换发光性能研究

顾佚毫¹，李艳霞¹，王旭升¹，方华¹

¹同济大学材料科学与工程学院，上海  201804

关键词：铋层状结构，铁电陶瓷，稀土掺杂，上转换发光

中图分类号：TM282             文献标识码：A

摘要:采用传统的固相烧结法, 制备了Bi_3-xEr_xTi_0.98Ta_0.02Nb_0.98W_0.02O₉(x=0.00,0.02,0.06,0.1,0.14,0.24)铋层状结构陶瓷。经X 射线衍射(XRD)表征,新合成材料为单相结构。Er³⁺掺杂后，陶瓷样品在室温下显示出了很强的上转换发光，且随着Er³⁺掺杂含量的增多，由明亮的绿色变为黄色发光。室温时,在可见光波长范围内,有3个峰, 分别为534nm和549 nm处的绿光峰和670nm处的红光峰, 对应于Er³⁺离子的²H_11/2→⁴I_15/2、⁴S_3/2→⁴I_15/2和⁴F_9/2→⁴I_15/2跃迁。变功率条件下的发光强度研究表明绿光和红光发射均为双光子过程。以上研究结果表明，Bi_3-xEr_xTi_0.98Ta_0.02Nb_0.98W_0.02O₉是一种具有优异光学性能的新型多功能材料。

Er³⁺dopedBi₃Ti_0.98Ta_0.02Nb_0.98W_0.02O₉ferroelectrics:Up-conversional photoluminescence properties

GU Yi-hao,LI Yan-xia *, WANG Xu-sheng, FANG Hua

FunctionalMaterials Research Laboratory, Tongji University, Shanghai, 201804

Keywords:bismuth layer-structured, ferroelectrics, rare-earth doped, up-conversionluminescent

Abstract :Bismuthlayered-structure oxides in the Bi_3-xEr_xTi_0.98Ta_0.02Nb_0.98W_0.02O₉systemwere synthesized by the conventional solid state reaction approach. The XRD analysis showed that all the ceramics were the single phase with bismuthlayered-structure structure. A bright up-conversional photoluminescence(UC) can be measured by partially substituting Er³⁺ for Bi³⁺.Under 980 nm radiation excitation, three emission bands located at green (534nm, 549 nm) and red (670 nm) wavelength regions were obtained at roomtemperature. They can be assigned to ²H_11/2→⁴I_15/2,⁴S_3/2→⁴I_15/2and⁴F_9/2→⁴I_15/2. The dependence of theemission intensity on the pumping power indicated that the up-conversionemission was a two-photon process. These Er³⁺ doped Bi₃Ti_0.98Ta_0.02Nb_0.98W_0.02O₉based ferroelectrics could possibly be used as a multifunctional material for awide range of applications.