有机半导体薄膜的结构和性能的强磁场调变及同步辐射表征

项目名称： 有机半导体薄膜的结构和性能的强磁场调变及同步辐射表征

项目编号： No.U1232137

项目类型： 联合基金项目

立项/批准年度： 2013

项目学科： 物理学II

项目作者： 徐法强

作者单位： 中国科学技术大学

项目金额： 60万元

中文摘要： 改善有机电子学器件的性能一直是研究人员最感兴趣的问题。有机电子器件的性能受有机薄膜分子取向以及有机分子堆积方式的影响，薄膜内沿特定方向的有序密堆积能有效提高有机薄膜中载流子的传输速率，进而提高器件的效率。本项目拟利用磁场对有机分子薄膜内的分子取向进行调节，进而调变有机薄膜的性能，利用同步辐射X射线近边吸收精细结构谱(NEXAFS)、光电子能谱(PES)和芯能级空穴时钟谱等技术，对调节前后薄膜的分子取向和电子结构、电荷传输动力学进行系统研究，考察磁场对分子取向以及电学性能的调节机制，推动强磁场大科学装置在有机电子学上的应用，为新型器件的设计提供实验方法和理论依据。同时通过综合分析，明确分子取向与电学性能之间的关系，对于深入理解有机器件的工作机制以及优化器件性能有非常重要的意义。

中文关键词： 有机半导体；强磁场；同步辐射；分子取向；电学性能

英文摘要： In recent years, considerable attentions have been paid to the performance enhancement of organic electronic device. It has been widely acknowledged that molecular orientation and packing mode largely determine the device performance. Close packing of molecules with the molecular plane oriented at a particular direction can improve the carrier mobility and efficiency of the device. In this project, high magnetic fields will be applied for the modulation of the molecular orientation in organic semiconductor films, and further of the property of the films. Synchrotron-based photoemission spectroscopy (PES), near-edge X-ray absorption fine structure spectroscopy (NEXAFS) and core-hole clock spectroscopy will be used to investigate systematically the molecular orientation, electronic structure and charge transfer dynamics of the organic films before and after the application of the high magnetic fields. It is expected that the profound understanding for the modification mechanism on the molecular orientation and electronic properties by high magnetic fields will promote the application of High Magnetic Field and be benefit to the rational design of novel organic devices. In addition, the analysis on the relationship between the molecular orientation and the electronic properties in organic films is crucial for clari

英文关键词： organic semiconductor；high magnetic field；synchrotron radiation；molecular orientation；electric property