溶液加工型TADF荧光/磷光混合型白光器件组装和性能研究

针对白光OLED器件应用面临成本偏高和蓝光磷光材料寿命较短的限制，本申请围绕溶液加工型TADF荧光/磷光混合型白光器件开展材料设计和器件组装。特色是采用界面型激基复合物作为蓝光TADF材料的主体，利用其低驱动电压的优势，发展高功率效率的溶液加工荧光/磷光混合型白光器件。重点围绕两类器件开展研究，其一是面向高功率效率的白光器件，发展适用于蓝光TADF材料的高三线态能级界面型激基复合物主体，组装具有低驱动电压特性的TADF蓝光荧光器件和荧光/磷光混合型白光器件；其二是面向溶液加工多层结构的白光器件，采用具有耐醇溶剂侵蚀特性的树枝状TADF蓝光材料和醇溶性黄光磷光染料，结合正交溶剂法组装具有多层结构的荧光/磷光混合型白光器件。力争实现溶液加工型白光器件驱动电压的显著降低（<3.0V）和功率效率的突破（80～100lm/W），为发展具有应用潜力的低成本白光器件提供研究基础和创新思路。

In view of the restriction of white OLED by high cost and short lifetime of blue phosphors, this proposal aims at design and fabrication of solution-processed hybrid white OLED based on TADF blue emitters and yellow phosphors. The key is to use interfacial exciplex as the host for TADF blue emitter to develop low driving-voltage and high power-efficiency hybrid white device. The design and fabrication of two kinds of devices will be developed: one is to achieve low driving-voltage blue TADF device and high power-efficiency hybrid white device by developing high triplet-energy-level interfacial exciplex hosts suitable for TADF blue emitter; the other is to achieve solution-processed multi-layer hybrid white device through orthogonal-solvent method by using alcohol-resisting dendritic TADF blue emitter and alcohol-soluble yellow phosphors. With the achievement of low driving voltage (<3.0 V) and high power efficiency (80～100 lm/W) for solution-processed white OLED, we believe this study will provide innovative approaches for the development of white OLED with application perspective.