摘要/Abstract
即将出现的全球能源危机和低效的能源利用推动了节能设备在显示和照明领域中的应用.节能的有机发光二极管被认为是新一代智能显示器，成为未来节能照明光源最具竞争力的候选产品之一.而高效深蓝色材料的分子设计由于其固有的宽带隙，载流子电荷传输不平衡以及其在固态下的低效率，发展受到很大限制.菲并咪唑基团作为一种新型蓝光材料的构筑单元，具吸引力的双极特性和优异的荧光效率，引起了科研工作者的强烈兴趣.对于菲并咪唑基团深蓝光材料的分子设计及其光物理性能研究具有重要的意义.综述了近几年来含有菲并咪唑类基团蓝光材料的发展状况，对菲并咪唑基团衍生物电致发光器件的发光机理、设计思路与最新进展进行了综述，并对其在未来全彩显示和固态照明领域上的前景进行了展望.
关键词: 菲并咪唑, 蓝光材料, 有机电致发光, 有机发光二极管
The impending global energy crisis and inefficient energy utilization have driven the use of energy efficient devices for display and lighting applications. Energy-efficient organic light emitting diodes (OLEDs) are considered to be the next generation of smart displays, becoming one of the most competitive candidate for future energy-efficient lighting sources. The molecular design of high-efficiency deep blue materials are greatly limited due to their inherent wide bandgap, poor carrier charge balance and their low efficiency in the solid state. As a novel building block for blue-emitting materials, phenanthroimidazole (PI) group is attractive stems from their bipolar feature and excellent fluorescence efficiency, which has aroused strong interest of researchers. Molecular design and photophysical properties of phenanthroimidazole-based deep blue-emitting materials are of great significance. In this review, an overview of the recent studies on PI-based blue emitters for applications in organic light-emitting diodes (OLEDs) is presented. The luminescence mechanism, design and latest developments of the electroluminescent devices fabricated from phenanthroimidazole derivatives are described, and their prospects in the future of full-color display and solid-state lighting are forecasted.
Key words: phenanthroimidazole, blue emitter, organic electroluminesence, organic light-emitting diodes
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