高效氟代联蒽类深蓝光材料的合成及OLED性能

为了开发新型多功能的蓝光电致发光材料与器件,设计并合成了一系列氟取代联蒽类材料(BAnFs),通过改变吸电子基团的取代模式,进而调节其光物理性能、热稳定性和能级.以CBP为主体、BAnFs为掺杂的器件表现出高效的深蓝光发光性能,对应的色坐标为CIE (0.15, 0.08),特别是对BAn-(3,5)-CF3器件的电流效率为3.05 cd/A,最大外量子效率(EQE)高达5.02;.同时BAnFs材料可作为高性能的蓝光主体材料,其EQE为3.56;~5.43;.因此,BAnFs可作为新型高性能的多功能蓝光发光材料.

Synthesis and OLEDs Properties of High-efficient Deep-blue Materials Based on Fluorinated Bianthracene Derivatives

A series of novel fluorinated bianthracene derivatives (BAnFs) were designed and synthesized with the aim of developing new multifunctional blue materials in organic electroluminescent (EL) devices.The photophysical properties, energy levels and thermal stability of these BAnFs were tuned by different substitution pattens of electron-withdrawing groups.On the one hand, the OLEDs using the host 4,4'-bis(N-carbazolyl)biphenyl (CBP) doped with the fluorophores BAnFs exhibited Commission Internationale de l'Eclairage (CIE) color coordinates in the range of (0.15, 0.08).In particular, the maximum current density and external quantum efficiency (EQE) of the BAn-(3,5)-CF3-doped device were 3.05 cd/A and 5.02%, respectively.On the other hand, BAnFs worked as the excellent fluorescent hosts for N,N-diphenylamino phenyl vinyl biphenyl (DPAVBi) dopant to obtain high-performance OLEDs with excellent EQE of 3.56%-5.43%.Thus, fluorinated bianthracene derivatives (BAnFs) will play an essential role in improving external quantum efficiency/color purity compromise for future multifunctional blue fluorophores.