Synthesis, Characterization, and Electroluminescence of New Conjugated Polyfluorene Derivatives Containing Various Dyes as Comonomers
作者:Nam Sung Cho、Do-Hoon Hwang、Byung-Jun Jung、Eunhee Lim、Jaemin Lee、Hong-Ku Shim
DOI:10.1021/ma049728g
日期:2004.7.1
by the homopolymer, poly(9,9-dioctylfluorene-2,7-diyl) (PDOF), can be tuned by incorporating R1, R2, R3, and R4 comonomers, which have narrower band gaps. The absorption and emission maxima of the copolymers varied according to the position of the cyano group in the vinylene unit (α- or β-position) and the type of incorporated aromatic group (thiophene or phenylene). Notably, PFR4-S showed pure red emission
已设计,合成和表征了四种包含不同共聚单体(R1,R2,R3和R4)的新的芴基交替聚合物(PFR1-S,PFR2-S,PFR3-S和PFR4-S)。发现这些聚合物是热稳定的,并且容易溶于普通的有机溶剂。由这些聚合物制成的单层LED器件发出蓝绿色到纯红色的光。我们的结果表明,均聚物,聚(9,9-二辛基芴-2,7-二基)(PDOF)发出的光的颜色可以通过掺入R1,R2,R3和R4共聚单体来调节。带隙。共聚物的吸收和发射最大值根据氰基中的碳酸亚乙烯单元(α-或β位置而变化-位置)和结合的芳香族基团(噻吩或亚苯基)的类型。值得注意的是,PFR4-S显示出纯红色发射(CIE坐标值x = 0.66,y = 0.33),几乎与国家电视系统委员会要求的标准红色(0.66,0.34)相同。PFR3-S还表现出纯红色发射(色度值x = 0.63,y = 0.38),其最大亮度和最大外部量子效率在6 V时约为3100