Highly Efficient Blue Electrophosphorescent Device Using a Weak Electron Transporting Material

摘要：

Highly efficient blue electrophosphorescence in organic light-emitting device (OLED) has been achieved by employing a weak electron transporting material compacting layer without an additional energy barrier for charge transporting by inserting a hole blocking layer between the electron transporting layer and the emitting material layer. Iridium (III) bis(4,6-difluorophenyl)-pyridinato-N,C2picolinate (FIrpic) was used as the phosphorescent emitter, and over 20％ of maximum external quantum efficiency was achieved. This result contradicts the conventional notion that a weaker ET material in an OLED results in lower efficiency, which shows an alternative way to design electron transporting materials for blue electrophosphorescent devices.

关键词： Blue Phosphorescence Weak,Electron transporting material OLED

作者: Lixin Xiao Xing Xing Lingling Zheng Boyuan Qi Zhijian Chen Bo Qu Qihuang Gong

作者单位: State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing,100871, P. R. China

会议类型: 国际会议

会议名称: China Display/Asia Display 2011(2011年中国显示/亚洲显示会议)

会议地点: 江苏昆山

会议语种:英文

页码: 181

在线出版日期: 2011-11-07（万方平台首次上网日期，不代表论文的发表时间）