Abstract: 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.

Key words: 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.