CAJ | 학술논문

本文报道了利用LiF/Al作为负电极的有机电致发光器件，器件结构为ITO/TPD/Alq3/LiF/Al,LiF层的加入增强了电子注入，当其厚度为0.4nm时，器件的性能最好，与单层Al和Mg/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4.3V和Mg/Al电极时的3.0V降低到了2.0V，器件的最大亮度分别由4000cd/m2、14000cd/m2提高到19600cd/m2，器件的发光效率也分别增加了5倍和2倍，达到2.66lm/W.
본문보도료이용LiF/Al작위부전겁적유궤전치발광기건，기건결구위ITO/TPD/Alq3/LiF/Al,LiF층적가입증강료전자주입，당기후도위0.4nm시，기건적성능최호，여단층Al화Mg/Al전겁적동류기건상비，차시기건적개계전압유Al전겁시적4.3V화Mg/Al전겁시적3.0V강저도료2.0V，기건적최대량도분별유4000cd/m2、14000cd/m2제고도19600cd/m2，기건적발광효솔야분별증가료5배화2배，체도2.66lm/W.
It is reported the fabrication of organic light-emitting devices(OLEDs) using LiF/Al as cathode.The structure of this devices is ITO/TPD/Alq3/LiF/Al,and the insertion of the ultra-thin LiF layer enhanced the electron injection in this device.As a result,when the thickness of the LiF layer is optimized 0.4nm,the OLEDs′properties show best,its maximum brightness is 19600 cd/m2(17V),while the devices with Al cathode or Mg/Al cathode exihibit only 4000 cd/m2(22V),14000 cd/m2(19V) respectively.And the operating voltage for devices with LiF/Al cathode is lower (2.0V) than those of devices with Al cathode (4.3V) or Mg/Al cathode (3.0V).Its luminescent efficiency is 5 and 2 times than that of devices with Al cathode or Mg/Al cathode.