申请人:Yamamoto Hitoshi
公开号:US08941099B2
公开(公告)日:2015-01-27
The present invention provides an OLED in which an organic thin film layer comprising a single layer or plural layers between a cathode and an anode, wherein the organic thin film layer comprises at least one organic light emitting layer, wherein at least one light emitting layer comprises at least one host material and at least one phosphorescent emitter material, wherein the host material comprises a substituted or unsubstituted hydrocarbon compound having the chemical structure represented by the formula (A-I): formula (A-1) wherein R1 and R2 each represent independently a substituted or unsubstituted alkyl group having from 1 to about 5 carbon atoms; Ar1 represents a divalent residue of a benzene ring, a naphthalene ring, a chrysene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzo[a]triphenylene ring, a benzochrysene ring, a fluoranthene ring, a benzo[b]fluoranthene ring or picene ring; and Ar2 represents a monovalent residue of a naphthalene ring, a chrysene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzo[a]triphenylene ring, a benzochrysene ring, a fluoranthene ring, a benzo[b]fluoranthene ring or a picene ring; and Ar1 and Ar2 each may have independently one or plural substituent(s) selected from the group consisting of an alkyl group having 1 to about 3 carbon atoms, a cycloalkyl group having about 5 to about 7 ring-forming carbon atoms, a silyl group having about 3 to about 12 carbon atoms, a cyano group, a halogen atom and an aryl group having about 6 to about 16 ring-forming carbon atoms; and the phosphorescent emitter material comprises a phosphorescent organometallic complex having a substituted chemical structure represented by one of the following partial chemical structures represented by the formulae: formulae (I), (II), (III) wherein R is independently hydrogen or an alkyl substituent having 1-3 carbon atoms, and wherein at least one ring of the formula has one or more of said alkyl substituent.
本发明提供了一种OLED,其中在阴极和阳极之间包括单层或多层的有机薄膜层,其中有机薄膜层包括至少一个有机发光层,其中至少一个发光层包括至少一个主体材料和至少一个
磷光发射材料,其中主体材料包括具有以下
化学结构的取代或未取代的碳氢化合物(A-I):公式(A-1),其中R1和R2各自独立地表示具有1至约5个碳原子的取代或未取代的烷基;Ar1表示苯环,
萘环,
蒽环,
菲环,苯并
菲环,二苯并
菲环,苯并
三苯乙烯环,苯并
蒽环,
芴环,苯并
芴环或苯并[ b ]
芴环的二价残基;Ar2表示
萘环,
蒽环,
菲环,苯并
菲环,二苯并
菲环,苯并
三苯乙烯环,苯并
蒽环,
芴环,苯并
芴环或苯并[ b ]
芴环的一价残基;Ar1和Ar2各自可以独立地具有来自以下群组的一个或多个取代基:具有1至约3个碳原子的烷基,具有约5至约7个环形成碳原子的环烷基,具有约3至约12个碳原子的
硅烷基,
氰基,卤素原子和具有约6至约16个环形成碳原子的芳基;
磷光发射材料包括具有以下部分
化学结构的取代的
磷光有机
金属配合物,由以下公式表示:公式(I),(II),(III),其中R独立地表示氢或具有1-3个碳原子的烷基取代基,其中公式中的至少一个环具有一个或多个该烷基取代基。