申请人:Yamamoto Hitoshi
公开号:US20130126832A1
公开(公告)日:2013-05-23
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 R
1
and R
2
each represent independently a substituted or unsubstituted alkyl group having from 1 to about 5 carbon atoms; Ar
1
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, 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 Ar
1
and Ar
2
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一个由单层或多层组成的有机薄膜层,其中该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种主体材料和至少一种磷光发射剂材料,其中所述主体材料包括具有以下化学结构式(A-I)所表示的取代或未取代的碳氢化合物:化学结构式(A-1),其中R1和R2分别独立地表示具有1到约5个碳原子的取代或未取代的烷基基团;Ar1表示苯环,萘环,蒽环,菲环,苯并菲环,二苯并菲环,苯并三苯基烯环,苯并蒽环,芴环,苯并芴环,二苯并芴环,苯并三苯基烯环,苯并蒽环,芴环,苯并芴环,二苯并芴环,苯并三苯基烯环,苯并蒽环,芴环或苯并苯并芘环的二价残基;Ar1和Ar2各自可以独立地具有从1到约3个碳原子的烷基基团,约5到约7个成环碳原子的环状烷基基团,约3到约12个碳原子的硅烷基团,氰基,卤素原子和约6到约16个成环碳原子的芳基基团中的一种或多种取代基;而所述磷光发射剂材料包括具有以下部分化学结构式(I)、(II)或(III)之一所表示的取代化学结构的磷光有机金属配合物:式(I)、(II)或(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团,并且化学式中的至少一个环具有一个或多个所述烷基取代基团。