摘要
新型有机及高分子光电材料的制备与器件设计是目前国际上一个十分活跃的领域。与液晶平面显示器相比,有机和高分子电致发光平面显示器(OLED和PLED)具有主动发光、无角度依赖性、对比度好、轻、薄、能耗低等显著特点,具有广阔的应用前景。红、绿、蓝3原色是实现有效全色显示的必备条件。与红光和绿光材料相比,蓝光材料的效率、稳定性和色纯度都与前两者相去甚远。开发好的蓝光材料不仅可以作为OLED或PLED中的发光层,还可作为主体来掺杂制备绿光和白光光源。在蓝光材料中,基于芴的齐聚物和高分子拥有良好的热稳定性、高荧光量子效率和优异的电致发光特性,但其存在电荷注入与传输困难、易发生聚集、C9位易被氧化等缺点,这些缺点正是导致器件效率低、色纯度低、光谱稳定性差的原因。综述了基于芴的蓝光小分子和高分子的研究进展,主要针对含有电子给体、受体的齐聚芴和聚芴的材料设计、合成及电致发光性能,结果表明,既含空穴传输又含电子传输片段的材料比相应的只含电子给体或受体的材料性能更佳。
Since the earliest reports of organic/polymeric light emitting diodes（OLEDs/PLEDs）,fabricating ultrathin,full color,free-angle and large-area displays have stimulated intensive research interest around the world.To realize full color displays,high performance red,green,and blue light-emitting materials are required.In contrast to red and green emitters,only a few blue emitters showed efficient blue light-emitting materials can be used as not only emissive layer in OLEDs/PLEDs,but also host materials for efficient blue and white light source.Among the promising blue emitters,fluorene-based oligomers and polymers have displayed excellent thermal stabilities,fluorescent quantum yields,and electroluminescent behaviors.However,the fluorene-based electroluminescent blue materials usually exhibited inferior electroluminescence efficiency,poor color purity and spectral stability caused by weak charge injection and transport,aggregation/excimer formation,and/or the fluorenone of photooxidized fluorene.The progress of the fluorene-based blue light-emitting compounds and polymers was reviewed.The key point of the review was paid to the design,synthesis,and electroluminescent performance of oligofluorenes and polyfluorenes with electron-donors and/or acceptors.A large number of literatures have demonstrated that the materials containing both electron-donating and electron-withdrawing segments could have better performance than those corresponding ＂hole-only＂ or ＂electron-only＂ materials.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2012年第1期79-99,108,共22页
Journal of Functional Polymers
基金
上海市东方特聘教授计划
上海市领军人才计划资助项目
关键词
蓝光高分子材料
高分子电致发光
基于芴的齐聚物和高分子
聚芴
blue light-emitting polymer materials
polymeric light-emitting diodes
fluorene-based oligomers and polymers
polyfluorene
