TITLE

Improved performance and stability of organic light-emitting devices with Al–Cu alloy cathode

AUTHOR(S)
Chen, I.-Ching; Shiao-Wen Hwang; Chen, Chin H.
PUB. DATE
February 2005
SOURCE
Applied Physics Letters;2/28/2005, Vol. 86 Issue 9, p093508
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have developed a stable green organic electroluminescent (EL) device by using an Al–Cu alloy as a cathode, which has better performance and reliability than the device with an Al cathode. The device with an Al–Cu alloy cathode achieved an EL efficiency of 3.78 cd/A(2.18 lm/W) at 20 mA/cm2 and the operating voltage was 5.46 V, while device with Al cathode had an EL efficiency of 3.1 cd/A(1.34 lm/W) and 7.3 V at the same drive condition. The Al–Cu device achieved a 20% decay lifetime (t80) of 1234 h at an initial brightness of 756 cd/m2, which is twice the lifetime of conventional device with the state-of-the-art LiF/Al cathode.
ACCESSION #
16581393

 

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