有机光电器件中载流子输运和复合过程磁场效应的动力学研究

项目名称： 有机光电器件中载流子输运和复合过程磁场效应的动力学研究

项目编号： No.61275036

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 李峰

作者单位： 吉林大学

项目金额： 86万元

中文摘要： 在不包含任何磁性材料的常规有机光电器件（有机发光和有机光伏器件）中，外加一个很小的磁场（约几十毫特）在室温下就能改变发光器件的电流、发光强度和光伏器件的光电导，该磁场效应的发现不仅给有机光电器件带来了新的科学问题，而且有望开发一类集光-电-磁功能于一体的新型有机半导体器件。目前有机光电器件磁场效应的形成机理还存在很大争议，特别是载流子的输运和复合过程在其中所起的作用还不清楚。针对这一问题，本项目首次提出采用瞬态电致发光和瞬态光电流的方法，研究外加磁场作用下有机光电器件中载流子的传输和复合的动力学过程。通过总结和对比各种条件下载流子迁移率和复合系数的磁场效应规律，尝试建立和完善有机光电器件磁场效应的形成机制，为在信息存储、传感技术和手写输入等方面的应用奠定基础。此外，研究如何利用磁场效应来提高有机光电器件的电-光和光-电转换效率，为进一步提高器件效率提供新的途径。

中文关键词： 有机发光器件；磁场效应；时间分辨；瞬态电致发光；有机光电

英文摘要： A small magnetic field (﹤40 mt ) can change the current and light intensity of organic light-emitting diodes and photocurrent of organic solar cell with non-magnetic electrodes at room temperature. This phenomenon combined with the ease in device processing raises great interests since it not only offer new scientific questions, but also the potential to develop new multifunctional organic devices integrated with electronic, optical and magnetic properties. Up to date, the mechanism of magnetic field effects on the carrier transport and recombination is still under debate. In this project, we firstly propose the dynamic study of carrier transport and recombination processes of magnetic field effect in organic optoelectronic devices by using the transient electroluminescence and photocurrent method. The mode to explain the magnetic field effect will be tried to build through summarizing the experimental results of transient electroluminescence and photocurrent under various conditions, which would be the foundation of the applications in memory, sensor and handwriting input. In addition, how to increase the efficiency of organic optoelectronic devices by a magnetic field will also be studied, because the magnetic field effects would be a new path to enhance the quantum efficiency of organic optoelectronic devices

英文关键词： organic light-emitting diodes；magnetic field effect；time resolved；transient EL；organic optoelectronics