吲哚咔唑受体单元用于构筑窄发射光谱和长寿命的蓝色荧光材料

蓝色荧光材料因具有较小的效率滚降、可通过敏化实现高效发光等优势，受到了学术和产业界的持续关注。然而，蓝色荧光材料目前仍存在工作寿命短、发射光谱宽、色纯度不足等关键问题，这一现状制约着有机电致发光技术的进一步发展和应用。本项目将围绕构筑窄光谱、长寿命蓝色荧光材料所涉及的分子构效关系，以及器件老化过程中材料的失效机制开展研究。拟设计和合成一系列以吲哚咔唑衍生物为受体单元的新型蓝色荧光材料，通过发射光谱展宽的理论分析和分子稳定性预测技术，揭示导致蓝光材料光谱展宽的分子结构原理以及蓝光器件老化过程中的材料失效因素，并有针对性地对吲哚咔唑蓝光材料开展光谱窄化和提升弱键稳定性的分子结构修饰。为解决蓝光材料所面临的色纯度和工作寿命难题，推动蓝光器件突破产业化的技术难题提供理论指导。

Blue fluorescent materials have received continuous attentions from academic and industry because their advantages of small efficiency roll-off, achieving efficient sensitized emission, etc. However, so far, blue fluorophores are still suffered from key issues of short working lifetime, wide emission spectrum and insufficient color purity, which restrict further developments and applications for organic electroluminescence technology. In this project, molecular structure-performance relationships and the material failure mechanism of device degradation would be fully discussed to achieve narrowband emission and long operational lifetime blue fluorescent materials. Indolecarbazole derivatives would be adopted as acceptor units to design and synthesize a series of novel blue fluorophores. Through the theoretical analysis of emission spectrum broadening and molecular stability prediction technique, molecular structure principle for spectrum broadening, as well as material failure in blue device aging process are revealed. Furthermore, molecular modification of indolecarbazole blue fluorescence are properly introduced to narrow the emission spectrum and promote weak bond strength. The following investigations give theoretical guidance to handle problems of color purity and operational stability in blue fluorescent materials, and break through technical issues for blue organic electroluminescent industrialization.