新型聚集诱导发光材料的电化学聚合及性能研究

The electrochemical polymerization is used to prepare the novel AIE(Aggregation-Induced Emission) materials with high thermal stability. The organic fluorescent molecule with the AIE properties which can be polymerized by electrochemical polymerization is designed and synthetized. The polymer film is synthetized by one step of electrochemical polymerization. AIE polymer film has the dual characteristics of small molecules and polymer fluorescent material.The morphology and luminescence efficiency of the polymer film is control by changing the electrolyte composition, electrochemical methods and polymerization parameters such as power. The key technology of the synthesis of AIE polymer films by in situ electrochemical polymerization will be got in this project. The AIE polymer film with high fluorescence efficiency and smooth surface morphology will be used to the production of organic electroluminescent devices. This study will get a simple, efficient and new method of preparing high-performance AIE polymer film, the polymerization mechanism, AIE theories and morphological control factors of the polymer, which will be contributing to the development of light-emitting materials of organic light-emitting diode(OLED) and OLED industrial.

引进电化学聚合技术制备热稳定性高的新型聚集诱导发光(Aggregation-Induced Emission,AIE) 材料。首先设计合成具有AIE效应的、可通过电化学聚合的有机荧光小分子，再通过电化学聚合制备聚合物薄膜，使成膜和聚合一步完成，发光薄膜具有小分子和高分子荧光材料的双重特性。通过电聚合参数、电解液的组成、电化学方法等控制薄膜的表面形貌和发光效率，获得通过电化学方法原位聚合具有AIE效应的聚合物薄膜的关键技术。在此基础上，将经过优化得到的具有高的热稳定性和发光效率、表面平整的电聚合发光薄膜用于有机电致发光器件的制作，获得高性能的发光器件。本课题的实施将建立一种简单、高效制备高性能具有AIE效应的聚合物薄膜的新途径，发现相应的聚合机理、AIE机理、聚集态结构控制因素等，进而促进有机发光二极管(OLED)用发光材料的发展及OLED大规模产业转化。

有机电致发光（OLED）技术在显示和照明灯领域具有巨大的应用前景，但其器件的发光效率及寿命仍有待提高。采用AIE材料作为OLED器件的发光层有望解决传统发光材料聚集发光淬灭的问题，也为进一步提高OLED器件的性能打下了基础。而采用电化学聚合方法可方便地制备热稳定性好的具有网络交联结构的薄膜，有助于提高器件的寿命。.本项目建立了一种简单、高效的制备高性能具有AIE效应的聚合物薄膜的新途径，并成功应用于OLED的发光层。合成了以多咔唑功能化的AIE分子作为聚合前体，通过电化学聚合方法制备了交联网络结构的聚合薄膜作为OLED的发光层制备器件。所得的聚合薄膜表面光滑，粗糙度均小于5nm，具有良好的热稳定性。这些薄膜作为OLED发光层可达到普通显示器的应用要求。本课题的实施也促进了AIE材料及OLED用发光材料的发展。