作者:Albertus J. Sandee、Charlotte K. Williams、Nicholas R. Evans、John E. Davies、Clare E. Boothby、Anna Köhler、Richard H. Friend、Andrew B. Holmes
DOI:10.1021/ja039445o
日期:2004.6.1
longer chains there is quenching because of the lower energy triplet state associated with polyfluorene. In contrast, polymer complexes 18-21 [Ir(btp-(FO)(n))(2)(acac)] where n is 5-40 have better triplet energy level matching and can be used to provide efficient red phosphorescent polymer light-emitting diodes, with a red shift due to the fluorene attachment of about 50 meV. We contrast this small (50-70
我们报告了一系列可溶液加工的磷光铱配合物的合成和光物理研究。这些包含双环金属化铱单元 [Ir(ppy)(2)(acac)] 或 [Ir(btp)(2)(acac)],其中 ppy 是 2-苯基吡啶,btp 是 2-(2'-苯并[b ]噻吩基)吡啶,acac是乙酰丙酮化物。铱单元与低聚(9,9-二辛基芴基-2,7-二基)[(FO)(n)] 共价连接并结合形成复合物 [Ir(ppy-(FO)(n))(2 )(acac)] 或 [Ir(btp-(FO)(n))(2)(acac)],其中芴单元数 n 为 1、2、3、约 10、约 20、约 30 ,或大约 40。所有配合物在光致发光和电致发光中都表现出来自混合三线态的发射,同时有效地淬灭芴单线态发射。短链复合物,11-13,[Ir(ppy-(FO)(n)-FH)(2)(acac)] 其中 n = 0、1 或 2,显示绿光发射,通过 FO 附件红移约