聚合物半导体中磁阻现象的机理研究

项目名称： 聚合物半导体中磁阻现象的机理研究

项目编号： No.11474164

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 王建浦

作者单位： 南京工业大学

项目金额： 100万元

中文摘要： 有机半导体器件中的磁阻效应是最近才被观测到的新现象，有机磁阻器件有望 成为继有机发光二极管、有机太阳能电池、有机薄膜晶体管之后能实用化的新型功能器件。 然而目前对于有机磁阻效应的本质缺乏明确认识，发展新的实验技术手段，进一步研究各种 因素对有机磁阻现象的影响，深入理解其物理机制是一个亟需解决的难题。本课题将首创把 磁场和静态光诱导吸收光谱结合在一起，直接观察磁场对电子空穴对的复合过程的影响，从 而揭示有机磁阻的深层物理原理，最终设计与实现高性能的有机磁阻器件。电子空穴对的复 合过程不但是有机磁阻器件的核心问题，也是有机发光二极管与有机太阳能电池效率提升机 制的核心问题。本研究课题不但对设计高性能的有机磁阻器件具有直接意义，并且对设计 高性能的有机发光二极管与有机太阳能电池都有指导作用。

中文关键词： 共轭聚合物；有机半导体；磁阻效应；有机自旋电子学；光谱法

英文摘要： In the past few decades, electronic devices based on semiconducting polymers have been intensively investigated, and great success has been achieved in organic light-emitting diodes (OLEDs), organic solar cells (OSCs) and organic field-effect transistors (OFETs). Due to the recent observed organic magnetoresistance effect, organic spintronics is becoming attractive because of its rich fundamental physics and potential for device applications. However, the mechanism of organic magnetoresistance is still not clear, although it is important for the development of high performance organic spintronic devices. In order to reveal the organic magnetoresistance mechanism, this proposal intends to develop a new experimental technique, which is magnetic field modulated photo-induced absorption spectroscopy, to investigate how the magnetic field influences the process of charge carrier pair recombination in organic semiconductor devices. Formation of neutral states through charge recombination has a crucial role in achieving high performance organic magnetoresistance devices, and in determining the device efficiency of OLEDs and OPVs. Therefore, the proposed investigation plan will make significant contribution to the realization of applicable organic spintronic devices, and also to the further improvment of OLED and OPV device efficiency.

英文关键词： conjugated polymer;organic semiconductor;magnetoresistance;organic spintronics;spectroscopics