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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (5): 557-562. 上一篇    下一篇

研究论文

基于不同辅助配体螯合电磷光聚合物的合成与性能研究

甄红宇*,1，罗潺2，朱德喜1，叶辉1，刘旭1   

  1. (1浙江大学现代光学仪器国家重点实验室 杭州 310027)
    (2华南理工大学高分子光电材料与器件研究所 广州 510640)
  • 投稿日期:2007-07-27 修回日期:2007-10-22 发布日期:2008-03-14
  • 通讯作者: 甄红宇

Synthesis and Performances of Chelating Electrophosphorescent Polymers Based on Different Ancillary Ligands

ZHEN Hong-Yu*,1 ,LUO Chan2 ,ZHU De-Xi1, YE Hui1 ,LIU Xu1   

  1. (1 State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027)
    (2 Institute of Polymer Optoelectronic Material and Device, South China University of Technology, Guangzhou 510640)
  • Received:2007-07-27 Revised:2007-10-22 Published:2008-03-14
  • Contact: Zhen Hong-Yu

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970

被引次数

11 | 3

通过A-A, B-B型的Suzuki缩聚反应将三个具有不同辅助配体的2-(2'-苯并[b]噻吩)吡啶(btp)双环铱金属配合物引入芴和咔唑交替共聚物(PFCz)的主链上, 合成一系列最大发光波长在660 nm的红光螯合电磷光聚合物, 并研究了它们的电致发光性能. 实验证明了在这类电磷光聚合物中配合物单元辅助配体合理的分子设计, 可以提高配合物单体的溶解度, 提高聚合物的分子量和发光性能. 通过优化器件结构, 聚合物PFBtpIrf5单层器件(ITO/PEDOT:PSS/polymer＋PBD(30 wt%)/Ba/Al)的性能最好: 在电流密度为14.3 mA/cm2时, 最大外量子效率为1.93%.

关键词: 电磷光聚合物, 铱配合物, 辅助配体, 芴-咔唑交替共聚物

A series of red light-emitting chelating electrophosphorescent polymers based on fluorene-alt- carbazole copolymer (PFCz) with Ir complexes on the backbone were synthesized by Suzuki polycondensation of A-A- and B-B-type monomers. Three 2-(2'-benzo[b]thienyl)-pyridinato (btp) biscycloiridium complexes with different ancillary ligands combined with the neighboring fluorene segments were served as the guest complexes in the chelating polymers. Because the solubility of the complex monomers is very important for polymerization, the bidentate ancillary ligand of the bicycloiridium complexes also has an effect on the luminous properties of the chelating polymer. The best performance was achieved from device: ITO/PEDOT:PSS/PFBtpIrf5＋PBD(30 wt%)/Ba/Al with the maximal external quantum efficiency of 1.93% at a current density of 14.3 mA/cm2 with the CIE coordinates of (0.69, 0.29).

Key words: electrophosphorescent polymer, Ir-complex, ancillary ligand, fluorene-alt-carbazole copolymer