首页 | 本学科首页   官方微博 | 高级检索  
     


Management of charge carriers and excitons for efficient and color-stable white phosphorescent organic light-emitting diodes with simplified structure
Affiliation:1. State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China;2. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;3. Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;1. Institute of Molecular Science, Innovation Center of Chemistry and Molecular Science, Shanxi University, Taiyuan 030006, PR China;2. Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Taiyuan 030006, PR China;1. School of Physics and Electronics, Shandong Normal University, Jinan 250014, China;2. Department of Physics, University of Missouri, Columbia, MO 65211, USA;3. Institute of Theoretical Physics, Technische Universität Dresden, Dresden 01062, Germany;1. Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University Guangzhou, China;2. Group Linear Conjugated Systems, CNRS, Moltech-Anjou, University of Angers, 2 Bd Lavoisier, 49045, Angers, France;3. Center for Organic Electronics and Alternative Energies, Department of Chemistry, University of Ubon Ratchathani, 34190, Thailand
Abstract:We have demonstrated color-stable and highly efficient simplified white phosphorescent organic light-emitting diodes. The key feature is the use of a novel approach to confine the distribution of charge carriers and excitons across the whole blue emission layer. The resulting two-color white device has the maximum power efficiency and current efficiency of 45.5 lm/W and 43.5 cd/A with a very low color shift over a wide range of luminance. By systematically investigating the working mechanisms, we found that the ambipolar charge carrier transport ability of co-host layer which ensures the distribution of excitons to form in the whole blue emission layer was the critical factors for constructing color-stable white devices. Our results show that simplified white devices based on two organic materials achieving excellent color stability are possible.
Keywords:White organic light-emitting diodes  Color stability  Exciton recombination zone  Co-host  Simplified
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号