The Effect of LiF with Different Thickness as Electron Injection Layer of OLEDs
In this paper, we have fabricated two kinds of OLEDs, and their structures are respectively as follows: ITO/NPB (50 nm)/Alq3(65 nm)/Mg: Ag(10:1)(100 nm)/Ag (50 nm) and ITO/NPB(50 nm)/Alq3(65 nm)/LiF (x)/Al (100 nm). From the results, we can see that it can increase the current of device obviously by inserting LiF layer compared with Mg: Ag/Ag electrode at the same voltage. When the thickness of LiF layer is 1 nm, the performance is the best. Its maximal brightness can reach 14 700 cd/m2, while that of Mg Ag/Ag alloy electrode device is only 8 450 cd/m2. In addition, the luminous efficiency of the device mentioned above also has been obviously improved, and has reached the maximum 3.117 cd/mA under 7 V. Meanwhile, it is found that the performance will decrease along with the alteration of the thickness of LiF layer around 1 nm.
LiF Thickness OLEDS Effect
Zhixian Li Fanghui Zhang Xiufeng Wang Yanzhao Zhao
Department of Material science & Engineering,Shaanxi University of Science & Technology, Xian, Chin Department of Electric & Electron Engineering,Shaanxi University of Science & Technology, Xian, Chi
国际会议
上海
英文
1547-1550
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）