材料科学
铁电性
光致变色
发光
光致发光
电场
陶瓷
透明陶瓷
光电子学
铁电陶瓷
微观结构
透射率
光学
纳米技术
电介质
复合材料
物理
量子力学
作者
Yan Ma,Siqi Yang,Chunlin Zhao,Cong Lin,Jinfeng Lin,Xiao Wu,Min Gao,Tengfei Lin,Changqing Fang
标识
DOI:10.1021/acsami.2c09564
摘要
Rare earth Tb3+ doped (K0.465Na0.465Li0.07)(Nb0.93Bi0.07)O3 (KNNLB-x%Tb) lead-free transparent ferroelectric ceramics were designed and prepared. The effects of Tb3+ on phase structure, microstructure, optical transmittance, photoluminescence, and photochromic behaviors were studied. Although two ferroelectric phases coexist, the optical transmittance can reach the high value of 74% in the visible light region because of the fine grains, dense ceramic microstructure, large optical energy band gap, and relatively high symmetry of coexisting ferroelectric phases. In addition, Tb3+ works as a luminescent center, and the reversible photochromic modulation is achieved by alternate stimulation of illumination and heat treatment. Meanwhile, the luminescence contrast can be improved under in situ electric field stimulation due to the easy change of lattice symmetry in coexisting ferroelectric phases. The generation of color centers after illumination and the local crystal field around the luminescent center caused by in situ electric field contributes to above phenomena. These ceramics exhibit the great potential in optical data storage and anticounterfeiting.
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