基于聚芳醚的双色白光聚合物的合成与光物理及电致发光性能  

POLY(ARYL ETHER)S FOR EFFICIENT WHITE ELECTROLUMINESCENCE WITH SIMULTANEOUS BICOLOR EMISSION

作　　者：卞春雷[1] 江国新[1] 程延祥[1] 谢志元[1] 王利祥[1] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春130022

出　　处：《高分子学报》2012年第3期334-343,共10页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号21074130;50633040;20921061);国家重点基础研究发展计划(973项目;项目号2009CB623601;2009CB930603)资助

摘　　要：采用缩聚反应,通过将深蓝光荧光团(五联芴)和橙光荧光团(4-芴基-7-(4-二苯胺基-苯基)-2,1,3-苯并噻二唑)分别链接在聚芳醚的侧链上,合成了一种双色白光电致发光聚芳醚P1,接着将一种高效浅蓝光荧光团(2,7-二(9-乙基-咔唑乙烯基)芴)引入到了P1的侧链上,得到了聚芳醚P2和P3.系统研究了这些聚芳醚材料的溶解性、热稳定性、电化学性能、光物理性能和电致发光性能等.结果表明,所有聚芳醚都具有良好的溶解性与热稳定性;薄膜态时存在明显的由深蓝光荧光团到浅蓝光荧光团及橙光荧光团的能量转移;退火前后的薄膜光致发光光谱基本一致,表明具有优秀的光谱稳定性.基于这些聚芳醚的单层电致发光器件(ITO/PEDOT:PSS/高分子/Ca/Al),利用部分能量转移和电荷俘获作用,可以实现近白光发射.器件的最大电流效率可以达到7.96 cd/A,最大亮度为9950 cd/m2,色坐标为(0.33,0.44).A novel two color white light-emitting poly（aryl ether）（P1） containing blue unit and orange unit in the side chains was synthesized by a facile,metal-free condensation polymerization,and then P2 and P3were synthesized by introducing the light blue dopant（BCzVF） into P1＇s side chain.We studied solubility,thermal properties,electrochemical properties,optical properties and electroluminescent properties of the polymers.The results reveal that all the polymers have good solubility and high decomposition temperature,there are efficient energy transfer from deep blue unit to light blue unit and orange unit in solid film,and the PL spectra are almost same before and after annealing indicating their excellent spectral stability.Based on the single-layer device structure of（ITO/PEDOT：PSS/Polymers/Ca/Al）,white EL with simultaneous blue and orange emission was observed and was attributed to the partial energy transfer and charge trapping from the blue host to the orange dopant.The best device performance with a luminance efficiency of 7.96 cd/A,a maximum brightness of 9950 cd/m2 and CIE coordinates of（0.33,0.44） was achieved.

关 键 词：高分子电致发光器件 聚芳醚 能量转移 电致发光 

分 类 号：O631.3[理学—高分子化学]