High-performance Top-emitting White Organic Light-emitting Devices

摘要：

High-performance top-emitting white organic light-emitting devices (WOLED), using Al as the reflective bottom anode and LiF/Ca/Au as the semitransparent top cathode, were fabricated. Nanometers Au/V2O5 layer was deposited on Al anode for holes injection enhancement and the top cathode was capped with additional Alq3 layer as the dielectric capping layer for increasing its transmittance. Using three emissive layers with red, green, blue phosphorescent emitters respectively , the WOLED snowed a maximum external quantum efficiency of 9.1 ％ and a maximum power efficiency of 12.8 1m/ W. Broadband emission spectra with a very weak angular dependence were achieved. The emission in normal direction has a Commission Internationale de LEclairage coordinates of (x = 0.36, y - 0.43). The characteristics of this top-emitting WOLED are competitive with those of the corresponding bottom-emitting device.

关键词： Top-emitting WOLED High-performance

作者: X. L. Zhu J. X. Sun X. M. Yu M. Wong H. S. Kwok

作者单位: Center for Display Research and Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology,Clear Water Bay, Kowloon, Hong Kong, China

会议类型: 国际会议

会议名称: 2007亚洲显示国际会议（AD07）

会议地点: 上海

会议语种:英文

页码: 1346-1350

在线出版日期: 2007-03-12（万方平台首次上网日期，不代表论文的发表时间）