Using a double-doping strategy to prepare a bilayer device architecture for high-efficiency red PhOLEDs
作者:Ming-Tzu Kao、Wen-Yi Hung、Zhen-Han Tsai、Hong-Wei You、Hsiao-Fan Chen、Yun Chi、Ken-Tsung Wong
DOI:10.1039/c0jm02992k
日期:——
A simple, bilayered, red phosphorescent organic light-emitting device featuring a doubly-doped emitting layer comprising of the novel hole-transporting host DTAF, the electron-transporting host 27SFBI, and the emitter Os(bpftz)2(PPhMe2)2 covering the interfacial region provides an unusually high current of ca. 1560 mA cm−2 at 8.5 V, a maximum brightness of 32 700 cd m−2, external quantum efficiencies as high as 12.3% (10.9% at 1000 cd m−2), and a power efficiency of 13.5 lm W−1. This concise device architecture is very cost-effective and competitive for practical applications.
一种简单的双层红色磷光有机发光器件,具有双重掺杂的发射层,其中包含新型的孔传输主材 DTAF、电子传输主材 27SFBI,以及覆盖在界面区域的发射体 Os(bpftz)2(PPhMe2)2,在8.5 V时提供了异常高的电流约为 1560 mA cm−2,最大亮度为 32,700 cd m−2,外部量子效率高达 12.3%(在 1000 cd m−2 时为 10.9%),功率效率为 13.5 lm W−1。这种简洁的器件结构在经济上非常划算,并且在实际应用中具有竞争力。