Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1268168 | Organic Electronics | 2009 | 7 Pages |
Abstract
We have showed that the doping of an organic salt into a PVK-based polymer emissive layer could enhance the carrier balance greatly to result in higher luminance and luminous efficiency. It is found out that the salt-doped devices show the similar operating characteristics of frozen-junction light-emitting electrochemical cells (LECs). With the salt doping of 0.6Â wt.% and an appropriate salt activation process, the fabricated PVK-based polymer light-emitting diodes (PLEDs) shows the luminous efficiency of 15Â cd/A at the highest luminance of 55,000Â cd/m2 even without an electron-injecting LiF layer. Due to the enhanced carrier balance, the luminous efficiency is found to be maintained from the turn-on voltage to the voltage for the maximum luminance, which means a linear relationship between luminance and current density.
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Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
Dong-Hyun Lee, Jong Hyeok Park, Heeyeop Chae, Sung M. Cho,