Phosphorescent organic light emitting devices having a hole-transporting host in the emissive region

• Main Authors: OHKUMA, HIROSHI, YAMAMOTO, HITOSHI, WEAVER, MICHAEL S, KANDA, DAIZO, YOKOYAMA, NORIMASA, KASE, KOUKI, NAGAOKA, MAKOTO, ADAMOVICH, VADIM
• Format: Patent
• Language: Chinese; English
• Published: 01.01.2015
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; SEMICONDUCTOR DEVICES

An improved OLED includes an emissive layer disposed between a cathode and an anode where the emissive layer includes a multi-component host material and a phosphorescent emitter material. The host material includes at least a first host compound and a second host compound, where the first host compound is hole-transporting host compound having the general formula wherein R1, R2, R3, R4, R5, and R6 may be the same or different fluorine atom, chlorine atom, a deuterium atom, a cyano group, a trifluoromethyl group, a nitro group, linear or branched alkyl group (C1-C6), cyclo-alkyl group (C5-C10), linear or branched alkoxy group (C1-C6), cyclo-alkoxy group (C5-C10), substituted or unsubstituted aromatic hydrocarbon group, substituted or unsubstituted aromatic heterocyclic group, substituted or unsubstituted fused polycyclic aromatic group, r1, r4, r5 = 0, 1, 2, 3, or 4, r2, r3, r6; = 0, 1, 2 or 3, n = 0 or 1, and Ar1, Ar2, and Ar3 may be the same or different, substituted or unsubstituted aromatic hydrocarbon gr