新型高效Cu(I)发光材料的结构设计、功能优化和电致发光器件制备

The Cu(I) emissive materials have attracted great attention in OLED due to their excellent emissive properties, low cost and environmental benignancy. However, the application of the Cu(I) emissive materials has not been demonstrated because of their low Luminous efficiency and poor stability. Based on our experience in this area, we propose herein to synthesize the novel Cu(I) complexes with excellent thermal actived delayed-fluorescence or phosphorescence with proper emissive life through designing and tuning the molecular structure. Furthermore, we will investigate the inherent relationship between the molecular and electronic structures of the complexes and their emissive properties, modulate systematically the structures and the emissive function, and finally reach the goal to design and synthesize the Cu(I) emissive materials in a rational and controlled way. We plan to prepare 3~5 series of novel Cu(I) complexes with excellent physical and chemical stability as well as high quantum yields of their emissions, and fabricate OLED with chosen complexes. After the investigation of this project, 1~2 Cu(I) complexes with excellent properties comparable to the best of the noble transition-metal complexes.

由于具有优越的发光性能、价格低廉以及低污染等优势，铜发光材料在OLED的应用受到极大的关注。针对目前Cu(I)发光材料亟待解决的发光效率不高、材料稳定性较低等科学难题，结合我们已有的研究基础，通过分子设计、结构调控等手段，合成具有优秀发光性能的Cu(I)热活化延迟荧光材料和含有非金属重原子的Cu(I)磷光材料，研究材料的分子、电子结构和发光性能的内在关系，并对材料的结构与功能进行系统的调控，逐步实现新材料的合理有效控制合成。力争得到3～5个系列结构新颖、稳定性好、具有高效发光性能的材料，并进行OLED器件制备，争取获得1～2个能和当前性能最好的贵金属磷光材料相媲美的新型发光材料，总结材料构效关系规律等，为相关材料的研发提供有益的参考和依据。

开发廉价、高效、稳定的新型发光材料是OLED应用研究中的重要课题之一。本项目针对当前发光材料亟待解决的发光效率不高、材料稳定性较低等科学难题，在大量实验研究基础上，提出了“线性对称”、“配位诱导”、“刚性结构”等合成新策略。通过对给电子基团与吸电子基团的计算调控，设计合成了系列新型的N、P有机小分子配体，与Cu(I)/Ag(I)成功构筑了系列具有TADF特性的发光材料，并将相关研究拓展至有机小分子发光材料，成功获得几例具有优异发光性能的新材料。系统地研究该类发光材料结构、性能及发光机制间的关系，并对其OLED器件应用展开初步研究。相关研究成果为进一步开发新型材料及应用研究打下坚实基础，提供良好的理论依据。在本项目研究过程中，发表有该基金资助号的学术论文27篇，申请国内发明专利2项，其中获得授权1项，培养了3名博士，4名硕士。