## High power efficiency phosphorescent poly(dendrimer) OLEDs

 Title High power efficiency phosphorescent poly(dendrimer) OLEDs Publication Type Journal Article Year of Publication 2012 Authors Levell, J. W., Zhang S., Lai W. - Y., Lo S. C., Burn P. L., and Samuel I. D. W. Journal Opt. Express Volume 20 Issue S2 Pagination A213–A218 Date Published 03/2012 Keywords Light-emitting polymers, Thin film devices and applications Abstract We 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. URL http://www.opticsexpress.org/abstract.cfm?URI=oe-20-102-A213 DOI 10.1364/OE.20.00A213