基于菲并咪唑衍生物的高效非掺杂深蓝有机电致发光材料的设计、合成及其应用

Blue organic light-emitting devices (OLEDs) have attracted much attention for their importance in both full-color display and solid-state lighting. Given that phosphorescent OLEDs can theoretically achieve 100% internal quantum efficiency, many researchers have reported phosphorescent materials with high efficiency deep-blue emission. However, phosphorescence OLEDs typically have shorter lifetime and sharper efficiency roll-off at high brightness. Thus, phosphorescence and fluorescence OLEDs are often considered to be complementary and suitable for different applications. On the other hand, many high performance OLEDs involve doping of emitters into host materials. However, efficacious doping often requires precise control of doping concentration and inevitably increases manufacturing cost. It has also been pointed out that potential phase separation in the dopant?host system can render energy transfer ineffective. For these reasons, nondoped devices using blue light-emitting fluorescent OLEDs are still attracting considerable attention.In this proposal, several seirals of Donor-π-Acceptor structure phenanthroimidazole derivatives will be designed, synthesized and characterized. High performance deep blue organic light-emitting materials with high fluorescence quantum yield, good thermostability, photochemical stability and good film performing ability will be expected. We will study the relationship between their photophysical properties and molecular structure systematicall. And high efficiency nondoped deep blue organic light-emitting devices will be realized.

蓝光有机电致发光器件由于其在全彩显示及固体照明方面的应用，受到科研工作者的广泛关注！尽管磷光有机电致发光器件在理论上可以达到100%的内量子效率，实现了高效率的深蓝色器件，但其器件寿命较短，在亮度高时效率衰减非常严重，并且容易发生相分离。虽然人们开发了很多高效蓝光荧光发光材料，但真正的深蓝色发光材料很少！.本项目拟设计、合成几个系列具有双载流子传输性能的D-π-A结构的菲并咪唑衍生物，以期得到若干发光量子产率高、化学稳定性好、热稳定和成膜性能好的深蓝有机电致发光材料，系统研究其光物理性质与分子结构之间的关系，实现高效、稳定的非掺杂深蓝有机电致发光器件。

蓝光有机电致发光器件由于其在全彩显示及固体照明方面的应用，受到科研工作者的广泛关注！尽管磷光有机电致发光器件在理论上可以达到100%的内量子效率，实现了高效率的深蓝色器件，但其器件寿命较短，在亮度高时效率衰减非常严重，并且容易发生相分离。虽然人们开发了很多高效蓝光荧光发光材料，但真正的深蓝色发光材料很少！.本项目设计、合成几个系列具有双载流子传输性能的 给体-π-受体 结构的单菲并咪唑衍生物和双菲并咪唑衍生物。它们均具有良好的热稳定性、成膜性能、化学稳定性和发光量子产率高的特点。系统研究了其光物理性质与分子结构之间的关系。制备了不同结构的器件，优化器件结构，实现了高性能的非掺杂深蓝有机电致发光器件，绝大多少的器件外量子产率超过荧光器件的理论值（5%），并以理论计算加以佐证，研究了其发光机理符合杂化激发态（HLCT）的发光。器件的效率在其所在的色域中是文献所报道的最好的或最好的之一，一些器件实现了符合欧洲深蓝光标准的高效发光。.已在Chem. Mater.、Adv. Opt. Mater.和J. Mater. Chem.等国际化学和材料权威杂志发表高水平论文25篇，其中包括2篇邀稿综述性文章，JCR分区一区9篇，二区15篇，三区1篇，远超原计划的8-10篇预期研究成果！