Title
Efficient organic light-emitting diodes with C60 buffer layer.
Abstract
Organic light-emitting diodes (OLEDs) with C60 buffer layer were fabricated. The effect of C60 buffer layer on the performance of the devices was investigated by inserting C60 buffer layer at the interface between the electrode and organic layers. The device structures were (1) ITO/C60 (0.0, 0.4, 0.7 and 1.0nm)/NPB/Alq3/LiF/Al and (2) ITO/NPB/Alq3/C60 (0.0, 0.4, 0.7 and 1.0nm)/LiF/Al. The highest brightness and efficiency of the device (1) with 0.7nm-thick C60 layer reached 6439cd/m2 at 16V and 1.80cd/A at 6.4V, respectively. The enhancements in brightness and efficiency are attributed to an improved balance of hole and electron injections due to C60 layer blocking parts of the injected holes. On the contrary, the brightness and efficiency of the devices with the structure (2) had been hardly enhanced.
Year
DOI
Venue
2009
10.1016/j.displa.2008.10.001
Displays
Keywords
DocType
Volume
C60,Buffer layer,Balance of carriers,Organic light-emitting diodes (OLEDs)
Journal
30
Issue
ISSN
Citations 
1
0141-9382
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Zhaoyue Lv120.92
Zhenbo Deng276.20
Denghui Xu375.52
Xiufang Li421.59
Yong Jia500.34