新型掺杂铁电纳米材料的光电多功能化及耦合新效应研究

项目名称： 新型掺杂铁电纳米材料的光电多功能化及耦合新效应研究

项目编号： No.51502018

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 彭登峰

作者单位： 北京纳米能源与系统研究所

项目金额： 20万元

中文摘要： 无机铁电体是一类具有优异的电、力、热和光特性且用途极为广泛的重要功能材料。近年来，人们在不断优化电学特性的过程中，大量研究报道选择镧系稀土或过渡金属离子通过适量的掺杂，其铁电和压电性能可以得到有效的调控；同时，镧系稀土和过渡金属离子还可以用作绝缘电介质材料的激活剂，产生紫外到红外各种波段的光发射。然而，关于这些掺杂离子在铁电基质内发光行为的研究却相对滞后。本项目结合当前铁电材料的研究热点，以具有代表性的新型无机铁电纳米材料为基质，选择镧系稀土或过渡金属离子掺杂，研究掺杂离子在铁电基质内的发光行为。在微观尺度下，探索掺杂发光离子在新型铁电基质内受电场和应力作用下的发光新特性。与此同时，通过掺杂，系统地调控并优化铁电纳米基质固有的铁电和压电特性；在此基础上，探索铁电/压电与发光耦合新效应的作用机理并开发新型光电器件。该项目将拓宽铁电材料的研究范畴并为新型光电器件的开发奠定基础。

中文关键词： 压电；铁电；发光材料；耦合效应；掺杂

英文摘要： Among functional materials, inorganic ferroelectrics with uniquely electrical, mechanical, thermal and optical characteristics are of great importance and have wide range of applications. Over the past decades, developments of the advanced ferroelectrics have resulted in a great deal of information about the instinct ferroelectric and piezoelectric modifications on the ferroelectrics through lanthanide and transition metal ions doping. Importantly, lanthanide and transition metal ions exhibit unique luminescent properties that can be used as activators in various insulating host matrixes emitting wide range of luminescence from ultraviolet to near infrared. However, the luminescent advantages of these doping ions in the ferroelectric hosts are rarely exploited. The goal of this proposal is to study the luminescent behaviors of the dopants by incorporating the selected lanthanide and transition metal ions into the representative ferroelectric nanomaterials. One major part of this proposal is studying the luminescent properties through electric field and stress stimulus. Simultaneously, we systemically study the modification effects on the ferroelectric and piezoelectric properties of the host after doping. We also study new phenomena and mechanisms of ferroelectric/piezoelectric-luminescent couplings and design new optical-electrical devices from the luminescent ferroelectrics as prepared. We envisage that our study not only will extent a new direction for the ferroelectrics research, but also will greatly promote further developments of the advanced optical and electrical devices.

英文关键词： piezoelectric;ferroelectric ;luminescent materials ;coupling effect;doping