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采用Suzuki聚合方法并通过改变催化剂的投料量,合成了一系列具有不同分子量的N-苯基咔唑取代的蓝光聚(2,7-咔唑),并详细研究了分子量对聚合物的光物理、电化学和电致发光器件性质的影响.结果表明,刚性N-苯基咔唑侧链的引入,能够有效地调控主链之间的相互作用,提高蓝光的色纯度,并使得该系列聚合物的固态荧光量子效率高达0.40.同时,在热退火及器件工作过程中,没有观察到类似聚芴中绿光峰的出现,表明具有良好的光谱稳定性.单层聚合物电致发光器件的最大发光效率为0.33 cd/A,色坐标为(0.18,0.12).
A series of N-phenylcarbazole-substituted blue poly (2,7-carbazoles) with different molecular weights were synthesized by the Suzuki polymerization method and by changing the catalyst loadings. The effects of molecular weight on the photophysics , Electrochemistry and electroluminescent device.The results show that the introduction of rigid N-phenylcarbazole side chain can effectively regulate the interaction between the main chain, improve the color purity of blue light, and make the series of polymerization The solid-state fluorescence quantum efficiency of the material is as high as 0.40. At the same time, no green peak appeared in the similar polyfluorene during thermal annealing and device operation, indicating good spectral stability. The maximum luminous efficiency of 0.33 cd / A, color coordinates (0.18,0.12).