| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1440573 | Synthetic Metals | 2015 | 6 Pages |
•Anthracene derivatives end-capped with the various carbazole groups were synthesized.•Four materials are used to study the effect of structural variations on OLED devices.•The EL of these materials as dopants depend on the effective energy transfer from host material.
Four novel molecules, 9-(9,10-diphenylanthracen-3-yl)-9H-carbazole (1), 7-(9,10-diphenylanthracen-3-yl)-7H-benzo[c]carbazole (2), 7-(9,10-diphenylanthracen-3-yl)-7H-benzo[e]pyrido[3,2-b]indole (3), 7-(9,10-diphenyl-2-(7H-benzo[e]pyrido[3,2-b]indol-7-yl)anthracen-6-yl)-7H-benzo[e]pyrido[3,2-b]indole (4), based on 9,10-diphenylanthracene with carbazole derivatives, were designed and synthesized via Buchwald–Hartwig cross-coupling reactions. Multilayer OLED devices were fabricated with the following device structure: ITO/2-TNATA (60 nm)/NPB (20 nm)/α,β-ADN:blue dopant materials (10%, 30 nm)/DNAB (30 nm)/Liq:Al. Among those, the device using 1 exhibited the efficient blue emission with a luminous efficiency of 4.56 cd/A, power efficiency of 1.95 lm/W, an external quantum efficiency of 3.42%, and CIE x,y coordinates of (0.15, 0.17) at 20 mA/cm2, respectively.
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