申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0672741A1
公开(公告)日:1995-09-20
Disclosed are an organic electroluminescence device having at least a light emitting layer between the electrodes consisting of one pair of an anode and a cathode, at least one of which electrodes is transparent or semi-transparent, wherein said light emitting layer comprises a polymeric fluorescent substance which emits a fluorescence in a solid state, is soluble in solvents and comprises at least one kind of repeating unit represented by the following formula (1) and at last one kind of repeating unit represented by the following formula (2) with the number of the formula (1) repeating units being 2-50% of the total number of all the repeating units:
-Ar₁- (1)
-Ar₂- (2)
wherein Ar₁ and Ar₂ are each a bifunctional group forming a carbon-carbon bond with each of two adjacent groups, in the chemical structure of Ar₁, the number of the consecutive atoms present in the shortest path between the two carbon atoms bonding to said two adjacent groups is 1, 3 or 5, and in the chemical structure of Ar₂, the total number of the carbon and nitrogen atoms present in the shortest path between the two carbon atoms bonding to said two adjacent groups is an even number, and a novel polymeric fluorescent substance used in the above device.
本发明公开了一种有机电致发光器件,该器件在由一对阳极和一对阴极组成的电极之间至少有一个发光层,其中至少有一个电极是透明或半透明的,所述发光层包括在固态下发出荧光的高分子荧光物质、可溶于溶剂,由至少一种如下式(1)表示的重复单元和最后一种如下式(2)表示的重复单元组成,其中式(1)重复单元的数量占所有重复单元总数的 2-50%:
-Ar₁- (1)
-(2)
其中 Ar₁ 和 Ar₂ 分别是与两个相邻基团中的每一个形成碳-碳键的双官能团,在 Ar₁ 的化学结构中,存在于与所述两个相邻基团成键的两个碳原子之间的最短路径上的连续原子的数目为 1、3 或 5,并且在 Ar₂ 的化学结构中,与所述两个相邻基团成键的两个碳原子之间的最短路径上存在的碳原子和氮原子的总数为偶数。