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用Suzuki缩聚反应分别将窄带隙单元-苯并噻二唑-二苯胺(DPABT)和苯并噻二唑-三苯胺(TPABT)引入聚芴主链,合成了共聚物PF-DPABT和PF-TPABT,并比较了共聚物的发光性能.随着窄带隙单元含量的增加,其特征发射逐渐增强,说明发生了从聚合物主体单元到窄带隙单元有效的能量转移.两种共聚物在低窄带隙单元含量(1mol%)下的电致发光光谱仅出现窄带隙单元的特征发射,PF-DPABT共聚物为650～680nm之间的饱和红光,而PF-TPABT共聚物为590～610nm之间的橙红光,聚芴主体单元的发射被完全淬灭,说明与光致发光过程相比,电致发光过程中的能量转移更完全.基于共聚物PF-DPABT-1及PF-TPABT-5器件的最大外量子效率分别为1.3%和2.0%,器件结构为ITO/PEDOT:PSS/polymer/Ba/Al,是一类有希望的红光材料.
Narrow band gap units - benzothiadiazole-diphenylamine (DPABT) and benzothiadiazole-triphenylamine (TPABT) were introduced into the polyfluorene backbone by Suzuki polycondensation. Copolymers of PF-DPABT and PF-TPABT , And compared the luminescent properties of the copolymer.With the increase of the content of the narrow bandgap, its characteristic emission gradually increased, indicating the effective energy transfer from the main polymer unit to the narrow bandgap unit occurred.The two copolymers in the low narrow bandgap The electroluminescence spectrum at unit content (1 mol%) shows only characteristic emission of narrow bandgap units, the PF-DPABT copolymer is a saturated red light between 650 and 680 nm, and the PF-TPABT copolymer is between 590 and 610 nm Orange-red, polyfluorene main unit of the emission was completely quenched, indicating that compared with the photoluminescence process, electroluminescence process of energy transfer more completely based on the copolymer PF-DPABT-1 and PF-TPABT-5 device The maximum external quantum efficiency is 1.3% and 2.0%, respectively. The structure of the device is ITO / PEDOT: PSS / polymer / Ba / Al, which is a kind of promising red material.