Compounds exhibiting high hole mobility and/or high glass transition temperatures are provided which are of the formula [Ar1]m[Ar2]n wherein:
m is an integer from 1-3 and n is an integer and may be 1 or 2;
Ar1 represents a thianthrene residue having a linkage to Ar2 at one or two positions selected from ring positions 1-4 and 5-8 and optionally mono-, bi- or poly-substituted with C1-C4-alkyl-, C1-C4-alkoxy-, fluoro, phenyl or biphenyl which in the case of phenyl or biphenyl may be further substituted with C1-C4-alkyl-, C1-C4-alkoxy- or fluoro;
Ar2 represents a residue derived from an arylamine in which the aryl rings are phenyl, naphthyl or anthracenyl optionally substituted with C1-C4-alkyl-, C1-C4-alkoxy- or fluoro, a polycyclic fused or chain aromatic ring system optionally containing nitrogen or sulphur and in a chain aromatic ring system optionally containing one or more chain oxygen or sulphur atoms, a triarylphosphine oxide or an arylsilane the rings of any of which are optionally substituted with C1-C4-alkyl-, C1-C4-alkoxy- or fluoro.
Certain of the compounds may be used in electron transport layers and may be doped with p-type dopants. They may be incorporated into OLEDs, organic photovoltaic devices, imaging members and thin film transistors.
In further embodiments there are provided OLEDs or other devices e.g. electrostatic latent image forming members in which improved efficiency is obtained by using as electron transport layers, electron injectors, hosts and emitters (dopants) ambipolar or electron-transmitting compounds in which thianthrene is bonded to aryl e.g. 1-anthracenyl-9-yl-thianthrene, 1-biphenyl-4-yl-thianthrene and 9,10-Bis(1-thianthrenyl) anthracene.
提供了具有高空穴迁移率和/或高
玻璃化转变温度的化合物,其
化学式为[Ar1]m[Ar2]n,其中:
m 是 1-3 之间的整数,n 是整数,可以是 1 或 2;
Ar1 代表
噻蒽残基,在选自环位置 1-4 和 5-8 的一个或两个位置与 Ar2 连接,并可选地被 C1-C4-烷基、C1-C4-烷氧基、
氟、苯基或
联苯单取代、双取代或多取代,其中苯基或
联苯可进一步被 C1-C4-烷基、C1-C4-烷氧基或
氟取代;
Ar2 代表衍生自芳基胺的残留物,其中芳基环为可选被 C1-C4-烷基、C1-C4-烷氧基或
氟取代的苯基、
萘基或
蒽基,可选含有氮或
硫的多环融合或链状芳香环系统,以及在链状芳香环系统中可选含有一个或多个链状氧原子或
硫原子的三芳基氧化膦或芳基
硅烷,其中任一芳基环可选被 C1-C4-烷基、C1-C4-烷氧基或
氟取代。
某些化合物可用于电子传输层,并可掺杂 p 型掺杂剂。这些化合物可用于有机发光二极管、有机光伏器件、成像元件和薄膜晶体管。
在更进一步的实施方案中,提供了有机发光二极管或其他装置,例如静电潜像形成部件,其中通过使用
噻蒽与芳基(例如 1-
蒽基-9-基-
噻蒽、1-
联苯-4-基-
噻蒽和 9,10-双(1-
噻蒽)
蒽)键合的双极性或电子传递化合物作为电子传输层、电子注入器、宿主和发射器(掺杂剂),可提高效率。