Highly Efficient Electrophosphorescent Organic Light-emitting Diodes with Double-emission Layers
High-efficiency electrophosphorescent organic light-emitting diodes (OLEDs) with double-emission layers have been fabricated and investigated. Comparing with the conventional single-emission layer OLEDs, the alternative architecture incurs much better overall electroluminescence performance. For the red implementation, the external quantum efficiency (EQE) remains higher than 12％ over wider current density range and decay much slower than the control device. Power efficiency is enhanced over a wide luminance range from 10 to 10 000 cd/m2. Particularly, the lifetime is improved as well. For the green implementation, very high EQE ～20％ , corresponding to nearly 100％ internal QE, is achieved. This OLED also exhibit the maximum current efficiency of 77 cd/A and power efficiency of 68.5 Im/W.
External Quantum Efficiency Phosphorescence Organic Light-emitting Diode
J. X. Sun X. L. Zhu X. M. Yu M. Wong H. S. Kwok
Center for Display Research & Dept. of Electronic and Computer Engineering,The Hong Kong University of Science and Technology,Clear Water Bay, Kowloon, Hong Kong, China
国际会议
上海
英文
1554-1558
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）