title: Self-host blue-emitting iridium dendrimer with carbazole dendrons: nondoped phosphorescent organic light-emitting diodes.
abstract: A blue-emitting iridium dendrimer, namely B-G2, has been successfully designed and synthesized with a secondgeneration oligocarbazole as the dendron, which is covalently attached to the emissive tris[2-(2,4-difluorophenyl)-pyridyl]iridium(III) core through a nonconjugated link to form an efficient self-host system in one dendrimer. Unlike small molecular phosphors and other phosphorescent dendrimers, B-G2 shows a continuous enhancement in the device efficiency with increasing doping concentration. When using neat B-G2 as the emitting layer, the nondoped device is achieved without loss in efficiency, thus giving a state-of-art EQE as high as 15.3% (31.3 cdA1, 28.9 lmW1) along with CIE coordinates of (0.16, 0.29).
authors.forename: Debin
authors.initials: D
authors.lastname: Xia
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
authors.forename: Shumeng
authors.initials: S
authors.lastname: Wang
authors.forename: Baohua
authors.initials: B
authors.lastname: Zhang
authors.forename: Junqiao
authors.initials: J
authors.lastname: Ding
authors.forename: Lixiang
authors.initials: L
authors.lastname: Wang
authors.forename: Xiabin
authors.initials: X
authors.lastname: Jing
authors.forename: Fosong
authors.initials: F
authors.lastname: Wang