有机自旋光电子学的基本过程

有机自旋光电子学的研究方向分为磁场效应和自旋注入两个方面.研究表明,外加低磁场能够显著改变非磁性有机半导体材料的光致发光、注入电流、电致发光和光电流.这称为有机半导体材料的磁场效应.近年来,非磁性有机半导体材料的磁场效应引起了广泛的关注和研究兴趣.首先,有机半导体材料的磁场效应是强有力的实验手段,用以研究有机电学、光学和光电器件中电荷传输和激发态中的有用和无用过程,为解决电荷传输和激发态过程中的瓶颈问题提供有效的实验手段,为实现磁-光-电多功能集成提供科学原理,尤其是磁场效应能够为提高能量转换效率、探测和传感光电子学器件的响应频谱范围和灵敏度提供新思路.同时利用磁电极,有机半导体材料和器件中自旋注入及其对电荷传输和激发态过程的调控可以用于发展新型功能化的自旋光电子学器件.本文综述并讨论了有机半导体材料和器件中的磁场效应和自旋注入的光电子学效应.

Fundamental processes in organic spintroncis

Organic spintronics can be divided into two major topics： magnetic field effect and spin injection. It has been shown that external magnetic field can significantly change photoluminescence, injection current, electroluminescence and photocurrent in organic semiconducting materials, which corresponds to magnetic field effect in organic semiconducting materials. In recent years, magnetic field effects in non-magnetic organic semiconducting materials have attracted intensive attention and research interest. They have emerged as powerful experimental tools to study useful and unuseful processes in charge-transport and excited states in organic electronic, optic and optoelectronic devices, providing effective approaches to tackle bottle-neck problems in charge-transport and excited states processes and offering scientific principles for muti-functional integration of magnetic, optical and electronic properties. In addition, magnetic field effects open new avenues to enhance energy conversion efficiency, frequency range and sensitivity in optoelectronic detecting or sensing devices. Furthermore, spin injection and its tuning on charge-transport and excited states processes based on ferromagnetic electrodes in organic semiconducting materials and devices can be used to develop novel functional spin-optoelectronic devices. This paper reviews the fundamental processes involved in the effects of magnetic field and spin injection on optoelectronic functions in organic semiconducting materials and devices.