High power efficiency phosphorescent poly(dendrimer) OLEDs

TitleHigh power efficiency phosphorescent poly(dendrimer) OLEDs
Publication TypeJournal Article
Year of Publication2012
AuthorsLevell, J. W., Zhang S., Lai W. - Y., Lo S. C., Burn P. L., and Samuel I. D. W.
JournalOpt. Express
Date Published03/2012
KeywordsLight-emitting polymers, Thin film devices and applications
AbstractWe show that it is possible to produce an efficient solution-processable phosphorescent poly(dendrimer) OLED with a 32 lm/W power efficiency at 100 cd/m2 without using a charge transporting host or any improvements in light extraction. This is achieved by using the dendrimer architecture to control inter-chromophore interactions. The effects of using 4,4$\prime$,4?-tris(N-carbazolyl)triphenylamine (TCTA) as a charge transporting host and using a double dendron structure to further reduce inter-chromophore interactions are also reported.