全树枝状磷光分子简单混合构筑发光层的白光有机电致发光器件

项目名称： 全树枝状磷光分子简单混合构筑发光层的白光有机电致发光器件

项目编号： No.21274016

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 刘迪

作者单位： 大连理工大学

项目金额： 78万元

中文摘要： 白光有机电致发光器件（WOLED）由于被誉为下一代最有竞争力的平板显示器和最理想的半导体照明光源而成为近年来的研究热点。我们针对目前WOLED的效率尚不能达到实用要求的现状以及制备WOLED的各种传统方法的优缺点，提出制备"全树枝状磷光分子发光层"的单发光层WOLED的设想：设计合成一系列具有"自主体"功能特点的蓝、绿、橙、红光树枝状铱配合物，其中蓝光分子选用高三重态能量的类m-CP树枝，其它长波长发光分子通用低聚咔唑树枝，并将三原色或两种互补色的树枝状磷光分子简单混合旋涂，制备全树枝状磷光分子构成单发光层的WOLED。如此设计的白光OLEDs具有不再需要额外的主体材料、发光层内所有分子具有相同的分子外围而不容易出现相分离、调节树枝状分子的混合比例即可轻松优化白光颜色等优势。该研究提出了制备WOLED的新途径，首次尝试全树枝状磷光分子构筑发光层制备WOLED的新方法，并预期获得高效率白光。

中文关键词： 有机电致发光器件；白光；树枝状铱配合物；热致延迟荧光；荧光/磷光杂化白光器件

英文摘要： White organic light-emitting diodes (WOLED) are drawing more and more research attentions due to their practical applications as flat-panel displays and solid-state semiconducting lighting sources. However, the power efficiencies of most WOLEDs are still lower than what is needed for applications. Therefore, it is desired to develop novel light-emitting materials and to create simple and effective device architectures to finally improve WOLED performance. In present project, a new WOLED preparation method is proposed. First, a series of dendritic iridium complexes of different generations are designed and synthesized, among which the blue-emitting iridium complexes have m-CP dendrons with high triplet energy, and the green-, orange- and red-emitting iridium complexes have same oligo-carbazole dendrons. Second, the single-emitting-layer WOLEDs are fabricated by spin coating the mixed solution of the three primary color dendritic iridium phosphors or two complementary color ones. The emissive components will be properly selected to reach an ideal combination in terms of emitting color and dendron generations. The white light performance including color CIE coordinates and emission efficiencies are optimized by simply tuning the blending ratios. The present WOLED fabrication strategy has the following merits. (1) T

英文关键词： OLED；white light；dendritic iridium complexes；thermally activated delayed fluorescence (TADF)；hybride white OLED