The effect of C60 doping on the device performance of organic light-emitting diodes

Lee, Jun Yeob; Kwon, Jang Hyuk
February 2005
Applied Physics Letters;2/7/2005, Vol. 86 Issue 6, p063514
Academic Journal
The effect of C60 doping in the hole transport layer on the device performance of phosphorescent light-emitting diodes was investigated by changing the C60 content from 0% to 3%. Doping of C60 in 1,3,5-tris(N,N-bis-(4,5-methoxyphenyl)-aminophenyl)benzol resulted in efficient hole injection and low driving voltage at high luminance. In addition, the lifetime of the phosphorescent device was improved significantly by introducing a C60 molecule in the hole transport layer. The C60-doped device showed an extended lifetime of 1400 h compared with 700 h of the undoped device.


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