铁酸铋基多铁薄膜的光伏效应调控及其机理研究

项目名称： 铁酸铋基多铁薄膜的光伏效应调控及其机理研究

项目编号： No.11264026

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 赵世峰

作者单位： 内蒙古大学

项目金额： 52万元

中文摘要： 铁酸铋多铁薄膜奇异光伏效应的研究，为发展清洁可再生能源开辟了新途径。基于内蒙古自治区光伏产业发展的迫切需求，结合自治区丰富的稀土资源优势，本项目旨在研究铁酸铋基多铁薄膜的光伏效应调控及其机理。首先，利用脉冲激光沉积、磁控溅射和溶胶-凝胶等技术制备配比可控、成相良好、性能优异的高质量铁酸铋基多铁薄膜。在此基础上，通过掺杂改性、外场作用、优化电极和调制界面等方法调控多铁薄膜的电子带隙、铁电极化、畴壁结构、畴壁翻转、畴壁相互作用、疲劳特性和光电转换效率等，进而有效调控多铁薄膜的光伏效应,并进一步研究薄膜多铁性质与光伏效应变化响应的相关性，探索多铁薄膜奇异光伏效应的调控机理，最终揭示多铁薄膜光伏效应的光电转换的物理机制。本项目的研究不仅对认识反常铁电光伏效应的物理机制具有重要的前沿探索价值，也为这项光伏新技术应用于太阳能电池、开发新能源提供重要的研究基础。

中文关键词： 多铁薄膜；光伏效应；稀土；电场调控；界面调控

英文摘要： The research on novel photovoltaic effect of BiFeO3 multiferroic films develops a new avenue for exploiting clean and sustainable energy. Based on urgent requirements of photovoltaic industries and advantages of rich rare-earth resources in Inner Mongolia Autonomous Region, this project aims to study on the regulation of photovoltaic effect and its mechanism for the bismuth ferric based multiferroic thin films. Firstly, high-quality multiferroic films with controllable composition, good phase structure and properties will be prepared by pulse laser deposition (PLD), magnetron sputtering (MS) and sol-gel methods. Based on the so-prepared multiferroic thin films, the band-gap, ferroelectric polarization, the structure and rotation of domain walls, the interactions between domain walls, ferroelectric fatigue and photoelectric conversion efficiency can be regulated by doping modification, applying external field, optimizing electrode and modulating interface. Thus, the photovoltaic effect can be effectively regulated for the multiferroic thin films. The regulation mechanism of novel photovoltaic effect will be studied by analyzing the correlations between the multiferroic properties and the response of the photovoltaic effect. Furthermore, the physical mechanism of the photoelectric conversion for single-phase multi

英文关键词： Multiferroic films；Photovoltaic effect；Rare-earth；Regulation of electric field；Regulation of Interface