Synthesis and Characterization of Blue-Light-Emitting Poly(aryl ether)s Containing Oligofluorenes in the Main Chain

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• 作者：Guoxin Jiang ; Jiang Wu ; Bing Yao ; Yanhou Geng ; Yanxiang Cheng ; Zhiyuan Xie ; Lixiang Wang ; Xiabin Jing ; Fosong Wang
• 刊名：Macromolecules
• 出版年：2006
• 出版时间：November 14, 2006
• 年：2006
• 卷：39
• 期：23
• 页码：7950 - 7958
• 全文大小：360K
• 年卷期：v.39,no.23(November 14, 2006)
• ISSN：1520-5835

文摘

A series of blue light-emitting poly(aryl ether)s (PAEs) containing ter- or pentafluorenes in themain chain have been synthesized via nucleophilic substitution polycondensation reaction. The energy levels ofthe polymers were tuned by introducing hole-transporting triaryamine groups in the side chains and/or incorporatingelectron-transporting oxadiazole segments in the main chain. The optical properties of the polymers are dominantlydetermined by the well-defined oligofluorene segments, and therefore all polymers show high photoluminescencequantum yield. Differential scanning calorimeter (DSC) characterizations indicate that they are vitrified polymerswith high glass transition temperature (up to 156 C). The polymers comprising pentafluorenes exhibitelectroluminescent properties equal to or better than fully conjugated fluorene homopolymers. With the devicestructure of ITO/PEDOT:PSS/polymer/Ca/Al, an external quantum efficiency of 1.4% along with CommissionInternationale de L'Eclairage (CIE) coordinates of (0.17, 0.09) has been realized.