MATERIALS AND STRUCTURES FOR ENHANCING THE PERFORMANCE OF ORGANIC LIGHT EMITTING DEVICES
申请人:Thompson Mark E.
公开号:US20120133276A1
公开(公告)日:2012-05-31
A device is provided, having an anode, a cathode, and two adjacent organic layers disposed between the anode and the cathode. One organic layer is a phosphorescent emissive material. The other organic layer may comprise an aromatic hydrocarbon material, comprising an aromatic non-heterocyclic hydrocarbon core optionally substituted, and wherein the substituents are the same or different, and each is selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, heteroalkyl, substituted aryl, substituted heteroaryl and heterocyclic groups. The second organic layer may comprise a material having a molecular dipole moment less than about 2.0 debyes, such that the device has an unmodified external quantum efficiency of at least about 3% and a lifetime of at least about 1000 hours at an initial luminance of about 100 to about 1000 cd/m
2
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提供了一种装置,该装置具有阳极、阴极和两个相邻的有机层,这些有机层位于阳极和阴极之间。其中一个有机层是磷光发射材料。另一个有机层可以包括芳香族碳氢化合物材料,包括一个芳香族非杂环碳氢化合物核心,可选地被取代,其中取代基相同或不同,且每个取代基选自由烷基、烯基、炔基、芳基、杂原子烷基、取代芳基、取代杂芳基和杂环基的群。第二个有机层可以包括分子偶极矩小于约2.0德拜的材料,使得该装置具有至少约3%的未修改外部量子效率和在约100到约1000 cd/m2的初始亮度下至少约1000小时的寿命。