摘要
制备了利用KCl/Al作为负电极的有机电致发光器件,器件结构为ITO/NPB/Alq/KCl/Al,KCl层的加入增强了电子注入,当其厚度为1.5 nm时,器件的性能最好.与单层Al电极的同类器件相比,此时器件的开启电压由Al电极时的5 V降低到了2.5 V,器件的亮度在11 V时由231 cd/m2提高到15 070 cd/m2,器件的发光效率也增加了10倍,达到2.79 cd/A.
Fabricating an organic light-emitting device with high efficiency and brightness thin KCl/Al as cathode. The structure of the devices is ITO/NPB/AIq/KCl/Al, and the insertion of the ultra-thin KCl layer enhances the electron injection in this device. As a result, when the thickness of the KCl layer is 1.5 nm optimized, the OLEDs＇ properties show best,its maximum brightness is 15 070 cd/m^2 at 11 V, while the device with Al cathode exihihit only 231 cd/m^2. And the operating voltage for devices with KCl/Al cathode is lower （2. 5 V） than those of devices with Al cathode （5. 0 V）. Its luminescent efficiency is 10 times than that of devices with Al cathode.
出处
《泉州师范学院学报》
2008年第6期34-36,50,共4页
Journal of Quanzhou Normal University
基金
福建省自然科学基金项目(2006J0412)
福建省教育厅A类科研项目(JA06019)
泉州市科技局基金项目(2007G8)
关键词
有机电致发光
KCI/A1电极
效率
亮度
organic light-emitting devices
KCl/Al cathode
efficiency
brightness
