摘要
采用溶胶?凝胶法在Pt(111)/Ti/SiO2/Si(001)基片上制备了La和Ni共掺的多晶Bi0.975La0.025Fe0.975Ni0.025O3(BLFNO)薄膜,分别以氧化铟锡(ITO)和Pt/Sr Ru O3(SRO)为上电极构建了ITO/BLFNO/Pt和SRO/BLFNO/Pt两种电容器。研究了两种上电极对BLFNO薄膜电学性质的影响。当测试电场为1 333 kV/cm时,ITO/BLFNO/Pt和SRO/BLFNO/Pt电容器的剩余极化强度分别为105和139μC/cm2。通过拟合两种电容器的电流密度,发现导电机理都为Poole-Frankel机制。当404 nm的紫光入射到两种电容器表面,电流密度都相应的增大。测试电场为250 kV/cm时,ITO/BLFNO/Pt电容器电流密度增长量为6.55×10?4 A/cm2;而SRO/BLFNO/Pt电容器的增长量为1.38×10?4 A/cm2。
A thin film of polycrystalline La and Ni co-doped Bi0.975La0.025Fe0.975Ni0.025O3(BLFNO)was deposited on Pt(111)/Ti/SiO2/Si(001)substrate by a sol-gel method.Two capacitors of ITO/BLFNO/Pt and SrRuO3(SRO)/BLFNO/Pt were constructed.The remanent polarizations of ITO/BLFNO/Pt and SRO/BLFNO/Pt capacitors measured at 1 333 kV/cm are 105 and139μC/cm2,respectively.The Poole-Frank conduction behavior is a dominated leakage mechanism of both capacitors.The leakage current density of both capacitors increases when exposed to a purple light of 404 nm.The increase of current density of ITO/BLFNO/Pt capacitor is larger than that of SRO/BLFNO/Pt capacitor when the testing electric field is 250 kV/cm.
作者
彭增伟
刘保亭
PENG Zengwei1, LIU Baoting2(1. College of Science and Technology, North China Electric Power University, Baoding 071051, Hebei, China; 2. College of Physics Science and Technology, Hebei University, Baoding 071002, Hebei, Chin)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2018年第7期972-977,共6页
Journal of The Chinese Ceramic Society
基金
中央高校基本科研业务费专项资金(2016MS157)
国家自然科学基金(11374086)项目
关键词
铁酸铋薄膜
镧镍共掺
上电极
电学性质
bismuth ferrite thin film
lanthanum nickel co-dope
top electrodes
electric properties