Inhibiting oxygen vacancies and twisting NbO_(6) octahedron in erbium modified KNN-based multifunctional ceramics  

作　　者：Lulu Gao Zhiyong Liu Pengrong Ren Renhong Liang Ting Li Kun Guo Bing Xie Jinshan Lu Pu Mao Jun Tian Longlong Shu 

机构地区：[1]School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang,330063,China [2]School of Materials Science and Engineering,Xi'an University of Technology,Xi'an,710048,China [3]School of Physics and Materials Science,Nanchang University,Nanchang,330031,China [4]Institute of Applied Chemistry,Jiangxi Academy of Sciences,Nanchang,330096,China

出　　处：《Journal of Materiomics》2024年第1期179-189,共11页无机材料学学报（英文）

基　　金：supported by the National Natural Science Foundation of China(Grants No.52162019,No.51802140,No.52202136,No.12174174);the Natural Science Foundation of Jiangxi Province(Grant No.20212ACB214011).L.S.expresses thanks for the support from Nanchang University.

摘　　要：It is a challenge to obtain highly tunable multifunctional performances in one ferroelectric system by a simple approach to meet the miniaturization,integration,and functionalization requirements of advanced electronic components.Herein,rare earth erbium(Er)modulated 0.9K_(0.5)Na_(0.5)NbO_(3)-0.1Sr(1-x)Er_(x)Ti_((1-x/4))O_(3),(0.9KNN-0.1ST:xEr)transparent-photoluminescent-ferroelectric energy storage multifunctional ceramics are prepared to solve this problem.The effect of lattice distortion and oxygen vacancies by Er doping on the optical and electrical properties is systematically investigated.The Er^(3+)ions can introduce a large distortion of the NbO_(6) octahedron by replacing the A-site in KNN-based ceramics.Thanks to the higher c/a ratio and lower oxygen vacancy content are simultaneously obtained in 0.9KNN-0.1ST:0.1Er ceramics.The effective energy storage density(Wrec)of 0.86 J/cm^(3),excellent near-infrared transmittance of 51.7%(1100 nm)and strong green upconversion photoluminescence are achieved in this multifunctional ceramic.This study provides a solid basis for rare earth ions doped ferroelectric ceramics with tunable multifunctional properties and has significant potential for applications in optoelectronic devices.

关 键 词：KNN Upconversion photoluminescence Multifunctional ceramics Oxygen vacancy OCTAHEDRON 

分 类 号：TQ174.1[化学工程—陶瓷工业]