双极性有机电致蓝光材料及器件性能研究

A series of bipolar compounds by utilizing 4,5-diazafluorene segment as skeleton structure appended with different charge transport moieties and chromophore groups are to be designed, synthesized and characterized. The attributes of the 3D structures and bipolar property of these 4,5-diazafluorene derivatives favours their applications in non-doped blue OLEDs. With these new bipolar compounds, blue OLEDs with non-doped structures are fabricated to investigate the properties of these 4,5-diazafluorene derivatives as blue emitter. The influence of different charge transport moieties and chromophore groups on EL prperties of the bipolar compounds are discussed and summarized in theory for higher efficiencies and better color purity. This project is made to fabricate high efficiency (external quantum efficiency is greater than 4%) and stable single layer blue OLEDs with these new bipolar compounds, and would provide important significance for the practicality and popularization of OLEDs technology utilizing in the large area of solid state lighting and full color display.

以4,5-二氮杂芴作为骨架结构，引入空穴传输基团咔唑、芳香胺和电子传输基团噁二唑和苯并咪唑，并结合蓝光发色团，制备双极性蓝光材料，并对其结构进行表征。通过调节不同载流子传输性能基团的数目和不同发色团，调控发光分子的载流子传输平衡和蓝色发光亮度以及色纯度。利用真空蒸镀和旋涂法制备非掺杂型OLED器件，通过考察不同载流子传输性能基团的数目和不同发色团对蓝光材料电致发光性能的影响，从理论上总结出进一步优化双极性蓝光材料的规律，争取通过旋涂方法制备出发光效率高（外量子效率大于4% ）、稳定好的单层蓝光器件，而这对OLED技术在大面积固态照明和全色显示领域的真正实用化和普及有着非常重要的意义。

以4,5-二氮杂芴作为骨架结构，引入空穴传输基团咔唑、芳香胺和电子传输基团噁二唑和苯并咪唑，并结合蓝光发色团，制备双极性蓝光材料，并对其结构进行表征。通过调节不同载流子传输性能基团的数目和不同发色团，调控发光分子的载流子传输平衡和蓝色发光亮度以及色纯度。利用真空蒸镀和旋涂法制备非掺杂型OLED器件，通过考察不同载流子传输性能基团的数目和不同发色团对蓝光材料电致发光性能的影响，从理论上总结出进一步优化双极性蓝光材料的规律，通过旋涂方法制备出发光效率高、稳定好的不掺杂蓝光器件，而这对OLED技术在大面积固态照明和全色显示领域的真正实用化和普及有着非常重要的意义。