文献类型：期刊文献

中文题名：Optimization of a poly (p-phenylene benzobisoxazole)-based light-emitting device with a complex cathode structure

英文题名：Optimization of a poly(p-phenylene benzobisoxazole)-based light-emitting device with a complex cathode structure

作者：Zhang, Xiao-Jin[1]; He, Zhi-Qun[1]; Wang, Jing[1]; Mu, Lin-Ping[1]; Zhao, Huan[1]; Liang, Chun-Jun[1]; Zhuang, Qi-Xin[2]; Han, Zhe-Wen[2]

机构：[1] Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China; [2] Key Laboratory for Specially Functional Polymeric Materials and Related Technology, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

年份：2013

卷号：22

期号：11

起止页码：607

中文期刊名：Chinese Physics B

外文期刊名：Chinese Physics B

收录：CSTPCD;;EI(收录号：20134917055464);Scopus;CSCD:【CSCD2013_2014】；

基金：Project supported by the National Natural Science Foundation of China(Grant No.21174016);the Research Fund for the Doctoral Program of Higher Education of China(Grant No.20120009110031);the 111 Project of China(Grant No.B08002)

语种：英文

中文关键词：electroluminescence;organic semiconductors;light-emitting devices;electronic transport phe-nomena

外文关键词：Aromatic compounds - Luminance - Efficiency - Electroluminescence - Cathodes - Current density - Light - Display devices - Organic light emitting diodes (OLED)

摘要：In this work, we report the preparation of a series of electroluminescent （EL） devices based on a high-performance polymer, poly（p-phenylene benzobisoxazole） （PBO）, and their optoelectronic properties, which have been rarely explored. The device structure is optimised using a complex cathode structure of tris-（8-hydoxyquinoline） aluminium （Alq3）/LiF/Al. By tuning the thickness of the Alq3 layer, we improve the device efficiency dramatically in an optimized condition. Further analysis reveals that the Alq3 layer in the complex cathode structure acts as a hole blocker in addition to its electron-injection role. A green light emission with a maximum brightness of 8.7×103 cd/m2 and a moderate current efficiency of 4.8 cd/A is obtained. These values are the highest ever reported for PBO devices. The high operational stability demonstrated by the present device makes it a promising tool for display and lighting applications. A new material is added to the selection of polymers used in this field up to now.
In this work, we report the preparation of a series of electroluminescent (EL) devices based on a high-performance polymer, poly(p-phenylene benzobisoxazole) (PBO), and their optoelectronic properties, which have been rarely explored. The device structure is optimised using a complex cathode structure of tris-(8-hydoxyquinoline) aluminium (Alq3)/LiF/Al. By tuning the thickness of the Alq3 layer, we improve the device efficiency dramatically in an optimized condition. Further analysis reveals that the Alq3 layer in the complex cathode structure acts as a hole blocker in addition to its electron-injection role. A green light emission with a maximum brightness of 8.7 × 103 cd/m2 and a moderate current efficiency of 4.8 cd/A is obtained. These values are the highest ever reported for PBO devices. The high operational stability demonstrated by the present device makes it a promising tool for display and lighting applications. A new material is added to the selection of polymers used in this field up to now. ? 2013 Chinese Physical Society and IOP Publishing Ltd.