Synthesis of pure blue emissive poly(2,7‐carbazole)s anchored by electron donor pendant
作者:Takashi Inada、Toshinobu Shinnai、Masashi Kijima
DOI:10.1002/pola.29523
日期:2019.12.15
Three novel poly(2,7‐carbazole)s having hole injection and transporting pendent moieties of carbazole and triphenylamine at the N‐position were synthesized for achieving pure blue electroluminescence. The N‐pendants in the polymers correspond to N‐phenylcarbazol‐2‐yl (P1), N,N‐diphenylamino‐N‐phenylcarabazol‐2‐yl (P2), and 4‐phenyl having a hydrocarbon chain with a triphenylamine terminal (P3), respectively
合成了三种新型的聚(2,7-咔唑),它们在N位置具有空穴注入和咔唑和三苯胺的悬垂部分,以实现纯蓝色电致发光。所述Ñ -pendants在聚合物中对应于Ñ -phenylcarbazol -2-基(P1),Ñ,Ñ -diphenylamino- Ñ -phenylcarabazol -2-基(P2) ,并且具有与三苯胺终端的烃链(4-苯基P3)。将这些聚合物的电子,光学和电致发光性质与在N处直接与三苯胺连接的聚(2,7-咔唑)的性质进行了比较具有聚合诱导发射特性的位置(P0)。光致发光(PL)光谱表明它们可以在薄膜状态下在蓝光区域发射。特别是,具有固定且较大的二苯基氨基咔唑侧基的P2显示深蓝色荧光,CIE(x,y)=(0.15,0.07)。基于P0,P2和P3的发光二极管器件显示出最大电致发光波长,范围为430-450 nm。所述P2器件显示纯蓝色发光(CIE [ X,ÿ ] = [0.18