Optimization of Microcavity Top-emitting Organic Light-emitting Devices with MoOx as Hole Injection Layer
Top-emitting organic light-emitting devices ( TOLEDs) using a thin MoOx film deposited on a thick Ag as the reflective anode and LiF/Al/Ag as the semitransparent cathode are demonstrated. The hole injection of Ag anode can be significantly improved with surface modification using a MoOx thin film. For microcavity TOLEDs, optical length pay important role in determing the efficiency and color of the devices. By changing the optical length , the cavity resonance can be tuned to be consistent with the peak wavelength of spontaneous emission. In this way , the optimized efficiency is obtained. With Alq3 as the emitting layer, the optimized TOLEDs with MoOx as hole injection layer shows a tune-on voltage of 2,68 V and a maximum current efficiency of 7.44 cd/A, which are much better than those (3.37 V, 4.67 cd/A) obtained from the conventional OLED. The good performance of TOLED is attributed to the efficient hole injection from the Ag/MoOx anode as well as the optimized microcavity effect.
Organic Light-emitting Devices Top-emitting MoOx Microcavity
Jin Cao Wenqing Zhu Xueyin Jiang Zhilin Zhang
Key Laboratory of Advanced Display and System Applications,Ministry of Education, Shanghai Universit Department of Materials science, Shanghai University,Shanghai 200072, China
国际会议
上海
英文
401-405
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）