将缺电子单元—S,S-二氧-二苯并噻吩(SO)以2,8位引入到聚螺芴(PSFs)的主链,通过Suzuki聚合得到一系列具有不同SO含量的共聚物PSF-28SO-3、PSF-28SO-5、PSF-28SO-7和PSF-28SO-10.不同于3,7位连接,该系列2,8-位连接的共聚物既有来自于高分子主链的本征态(LE:local excited)发光,又有来自于从四烷氧基芴侧链到主链中SO单元的电荷转移(CT:charge transfer)发光,最终表现为近白光发射.其中,PSF-28SO-10具有最优器件性能,发光效率为0.58 cd/A,色坐标为(0.25,0.36).
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