铁电纳米管阵列的量子尺寸效应及光电耦合机制研究

项目名称： 铁电纳米管阵列的量子尺寸效应及光电耦合机制研究

项目编号： No.61504156

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 张金中

作者单位： 中国科学院上海技术物理研究所

项目金额： 19万元

中文摘要： 无铅铋基铁电材料（铁酸铋、铝酸铋和钛酸铋等）具有成本低、漏电小、光电压大和环境友好等优点，有望在光伏太阳能电池、红外探测、非易失性存储器、微驱动器等领域得到广泛的应用。目前相关研究处于铁电薄膜结构的制备、性质和应用阶段。然而，铁电纳米结构的设计、制备、性质和应用有待进一步的研究和发展。本课题以元素掺杂铁酸铋、铝酸铋和钛酸铋薄膜和纳米管阵列作为研究对象，首先通过对镧锰元素的掺杂铁酸铋薄膜进行变温介电、铁电等电学研究，澄清铁酸铋材料的漏电机制，相应地提出有效克服漏电现象的新概念和新技术。在此基础上制备高质量铁酸铋、铝酸铋和钛酸铋等铁电纳米管阵列，在不同的温度、电场和磁场下研究其光电耦合特性及其量子尺寸效应。最后，对低维结构铋基铁电材料在光伏太阳能电池、红外探测和信息存储等领域的应用进行有效的探索。

中文关键词： 纳米管阵列；铁电材料；量子尺寸效应；电学性质；光电耦合

英文摘要： Lead-free bismuth-based ferroelectric materials (bismuth ferrite, bismuth aluminate, bismuth titanate, etc.) have the advantages of low cost, low leakage current, good photovoltaic properties, and environmental friendliness. Therefore, these materials are expected to used in the fields of photovoltaic solar cells, infrared detectores, nonvolatile memories, microdrives and others. At present, many investigations about the films of preparation, physical properties, and applications has been reported. Howe, the design, preparation, characterizations and applications of the ferroelectric nano-structure are in the primary stage, which should be further investigated. In this project, the optical, electrical, and magnetic properties of element doping bismuth ferrite, bismuth aluminate, and bismuth titanate thin films and nanotube arrays will be investigated. Firstly, the temperature dependences of dielectric and ferroelectric properties of lanthanum and manganese co-doped bismuth ferrite thin films will be studied to clarify the leakage current mechanism, and then new concepts and techniques are proposed to control the leakage phenomenon. Based on the investigation, we will prepare high quality bismuth bismuth ferrite, bismuth aluminate, bismuth titanate arrays and investigate the relationships between optical, electrical and other physical behaviors and quantum size effects at various temperatures, electric and magnetic fields. Finally, the low dimension Bi-based ferroelectric materials will be effect explored in the field of photovoltaic solar cell, infrared detectors, and information storage.

英文关键词： Nanotube arrays;Ferroelectric materials;Quantum size effects ;Electrcal properties ;Photoelectric coupling