红外与毫米波学报2019，Vol.38Issue(5)：554-558,5.DOI:10.11972/j.issn.1001-9014.2019.05.002
锰掺杂对钛酸锶铅铁电薄膜带-带跃迁和带尾吸收特性的影响
The effect of Mn doping on the interband transition and band tail absorption characteristics of Mn:(Pb, Sr)TiO3 ferroelectric thin films
摘要
Abstract
Mn composition dependence of optical properties,especially interband electronic transition and band tail absorption behaviors,in Mn doped (Pb,Sr)TiO3 (PST) films were investigated by transmittance spectroscopy.The optical parameters of Mn doped PST films in transparent region were evaluated by Cauchy model.The decrease of optical band gap and the expansion of the band tail states with the increasing of Mn dopant amount were observed.The shrinkage of optical band gap is attributed to lowering the bottom of conduction bands by Mn 3d orbitals and the decrease of lattice constant in Mn doped PST films.Meanwhile,the random occupation of Mn ion and the increase of oxygen vacancy after Mn doping are the main causes for the expansion of localized states in band tails.关键词
铁电薄膜/电子能带结构/光学特性/带尾Key words
ferroelectric films/electronic band structure/optical properties/band tails分类
数理科学引用本文复制引用
李延青,吴曼,杨静..锰掺杂对钛酸锶铅铁电薄膜带-带跃迁和带尾吸收特性的影响[J].红外与毫米波学报,2019,38(5):554-558,5.基金项目
supported by the Natural Science Foundation of China (61574058,61674058) （61574058,61674058）
