中国科学院合肥物质科学研究院强磁场科学中心坐落于安徽省合肥市风景秀丽的科学岛，2008年4月30日经中国科学院批准成立，依托中国科学院合肥物质科学研究院管理（科发人教字〔2008〕133号），其前身是2005年12月20日成立的“合肥强磁场科学技术研究中心”。中心目标：发展... 更多简介 +
稳态强磁场实验装置（Steady High Magnetic Field Facility，简称SHMFF）是国家发改委支持的“十一五”国家重大科技基础设施。SHMFF法人单位是中国科学院合肥物质科学研究院，共建单位是中国科学技术大学。各项任务以中国科学院强磁场科学中心为依托... 更多简介 +
报告人: Dr. Andrea Gassmann (德国Darmstadt技术大学)
报告题目：Electron Injection and Electrical Fatigue in Organic Light-emitting Diodes
报告时间：2012年10月15日（周一）上午10:00
报告地点：强磁场中心五楼学术报告厅
报告摘要：
For the realization of long-lived and high-performance organic light-emitting diodes (OLEDs), efficient and stable cathode is mandatory. We will demonstrate that a novel bilayer cathode of Li3PO4/Al exhibits an efficient electron injection and enhanced device lifetime of both molecular and polymeric OLEDs. The investigation has been performed on the mechanism behind and interface properties of the new cathode. These studies reveal that the enhanced electron injection is not due to the doping of organic semiconductor close to the cathode but rather to the formation of dipolar interface which causes the lowering of work function (WF) of the cathode. The WF of Li3PO4/Al is found to be comparable to that of calcium.
Usually, the OLEDs exhibit a degradation of performance during electrical operation, i.e. electrical fatigue. Here, we will present the latest results on the mechanism of fatigue in the PPV-based polymeric LEDs via the study of hole transport in unipolar and bipolar PPV devices with time of flight (TOF) technique.
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