Recent Advances in Solution-Processable Dendrimers for Highly Efficient Phosphorescent Organic Light-Emitting Diodes (PHOLEDs)
Recent Advances in Solution-Processable Dendrimers for Highly Efficient Phosphorescent Organic Light-Emitting Diodes (PHOLEDs)
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DOI：
10.1002/ajoc.201402266
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发表时间：
2015-05
影响因子：
2.7
通讯作者：
Xianbin Xu;Xiaolong Yang;Jiang Zhao;Guijiang Zhou;W. Wong
中科院分区：
文献类型：
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作者：
Xianbin Xu;Xiaolong Yang;Jiang Zhao;Guijiang Zhou;W. Wong
磷光树枝状聚合物与树枝状主体材料一起在以低成本、溶液处理的器件制造实现高效磷光有机发光二极管（PHOLED）方面具有固有的优势。近年来，在电致发光（EL）领域，人们致力于开发这些树枝状材料。在这篇焦点评论中，总结和讨论了这一研究领域的主要进展。特别强调了这些树枝状有机电子材料在解决PHOLED领域的关键问题中所起的关键作用。这些包括通过与树枝状结构相关联的位置隔离效应来减轻三重态-三重态湮灭效应，通过官能化树枝状基元来促进电荷载流子注入/传输能力和双极特性，实现具有高EL效率的简单PHOLED，获得自托管磷光发射体，以及避免从磷光核到树枝状基元的不期望的能量转移过程。此外，还强调了这一研究前沿的未来前景和持续挑战。
Phosphorescent dendrimers together with dendritic host materials have inherent advantages in achieving highly efficient phosphorescent organic light-emitting diodes (PHOLEDs) with low-cost, solution-processed device fabrication. Recently, much research effort has been devoted to developing these dendritic materials in the field of electroluminescence (EL). In this Focus Review, the major advances in this line of research are summarized and discussed. The crucial roles played by these dendritic organic electronic materials in coping with the key issues in the field of PHOLEDs have been specially emphasized. These include alleviating the triplet-triplet annihilation effect through the site-isolation effect associated with the dendritic structures, promoting charge-carrier injection/transporting ability and ambipolar properties through functionalized dendrons, fulfilling simple PHOLEDs with high EL efficiencies, obtaining self-hosting phosphorescent emitters, and avoiding undesired energy transfer process from phosphorescent cores to the dendrons. In addition, the future perspectives and ongoing challenges of this research frontier are also highlighted.