INK COMPOSITION FOR ORGANIC LIGHT EMITTING DEVICE, AND ORGANIC LIGHT EMITTING ELEMENT
申请人:DIC Corporation
公开号:EP3261144A1
公开(公告)日:2017-12-27
There is provided an ink composition for an organic light-emitting device which can easily form a light-emitting layer having more excellent uniformity and which is suitable for forming a light-emitting layer by a wet method. An ink composition for an organic light-emitting device includes a light-emitting material, a binder resin, and a solvent, the binder resin containing a multi-branched copolymer of a monovinyl compound composed of a styrene-based monomer as an essential component with a multifunctional vinyl compound containing two or more ethylenically unsaturated double bonds, and the copolymer having a weight-average absolute molecular weight within a range of 200,000 to 800,000 determined by gel permeation chromatography using a multi-angle laser light scattering detector and a degree of branching within a range of 0.20 to 0.55 determined from an inertial radius. An organic light-emitting device includes a positive electrode, a light-emitting layer, and a negative electrode, the light-emitting layer containing the binder resin.
本发明提供了一种用于有机发光器件的油墨组合物,该组合物可轻松形成具有更佳均匀性的发光层,并且适用于通过湿法形成发光层。一种用于有机发光器件的油墨组合物包括发光材料、粘合剂树脂和溶剂,粘合剂树脂含有单乙烯基化合物的多支链共聚物,该共聚物由苯乙烯基单体作为基本成分与含有两个或两个以上乙烯基不饱和双键的多功能乙烯基化合物组成、该共聚物通过使用多角度激光光散射检测器的凝胶渗透色谱法测定,其重量平均绝对分子量在 200,000 至 800,000 之间,支化度在 0.20 至 0.55 之间。20至0.55的范围内。有机发光器件包括正极、发光层和负极,发光层含有粘结树脂。