It is an object of the present invention to provide a high molecular weight compound that has excellent hole-injecting/transporting performance, is capable of blocking electrons, and is highly stable in a thin film state. It is another object of the invention to provide a light emitting diode with high luminous efficacy and a long lifespan, containing an organic layer (thin film) made of the above-described high molecular weight compound. The high molecular weight compound according to the present invention includes a repeating unit constituted by a specific triarylamine structural unit and a specific bonding structural unit, and has a weight average molecular weight in terms of polystyrene of 10,000 or more and less than 1,000,000.
本发明的目的是提供一种高分子量化合物,它具有优异的空穴注入/传输性能,能够阻挡电子,并且在薄膜状态下高度稳定。本发明的另一个目的是提供一种具有高光效和长寿命的发光二极管,其中含有由上述高分子量化合物制成的有机层(薄膜)。根据本发明的高分子量化合物包括由特定的三芳基胺结构单元和特定的键合结构单元构成的重复单元,其重量平均分子量以聚
苯乙烯计为 10,000 或以上,小于 1,000,000 。