title: High power efficiency phosphorescent poly(dendrimer) OLEDs.
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',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.
authors.affiliation: Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9SS, UK.
authors.forename: J W
authors.initials: JW
authors.lastname: Levell
authors.forename: S
authors.initials: S
authors.lastname: Zhang
authors.forename: W-Y
authors.initials: WY
authors.lastname: Lai
authors.forename: S-C
authors.initials: SC
authors.lastname: Lo
authors.forename: P L
authors.initials: PL
authors.lastname: Burn
authors.forename: I D W
authors.initials: ID
authors.lastname: Samuel