报告题目：有机半导体中电子输运和自旋注入

报 告 人： 高永立，中南大学

报告时间：12月13日（周四）16:00

报告地点：理科楼郑裕彤讲堂

报告摘要：Organic semiconductors are a fascinating new class of materials that shows a great potential in electronics, optoelectronics, and spintronics applications. Using angle-integrated and angle-resolved photoemission spectroscopy, inverse photoemission spectroscopy, and spin- and time-resolved two-photon photoemission spectroscopy, we have investigated the electronic structure of representative organic semiconductors, the interface band bending induced modification of electron transport, and spin injection into organic semiconductors. We observed that the high mobility and anisotropy of single crystal organic semiconductor can be well explained by the measured band dispersion. For vertically stacked organic bipolar transistors, Debye screening is found to be important to describe the transport properties. We observed that the spin injection efficiency for hot electrons is high from ferromagnetic substrate to organic semiconductor, and that the electron scattering can be strongly energy-dissipating but spin-preserving.