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• Two new V-shaped bis-coumarins with the benzophenone-imbedded triptycene and carbazole were synthesized. • These compounds exhibited strong green emission with PLQY of 0.90 and 0.94 in dichloromethane solution. • The device of the compound with the benzophenone-imbedded carbazole showed CE max = 8.94 cd/A, EQE max = 2.66 %. Two new V-shaped bis-coumarins (VBC) with the benzophenone-imbedded triptycene and carbazole, VBC CO-TTC and VBC CO Cz, were synthesized and characterized by NMR (1H and 13C), high resolution mass spectrometry and elemental analysis, and their thermal stabilities and photophysical and electrochemical properties were systematically studied. They exhibited strong green emission with high fluorescence quantum yield of 90.4 % and 93.65 % in dichloromethane solution, respectively. The combination of theoretical research and experimental data revealed the structure-property relationship of the functional groups grafted onto the V-shaped bis-coumarins. Moreover, the doped devices treated with the blend of CBP:VBC derivatives as the emitting layers showed green emission, in which the VBC CO Cz doped devices exhibited an maximum external quantum efficiency (EQE max) of 2.66 %, while the VBC CO-TTC doped devices showed an EQE max of 1.79 %, at the doping concentration of 5 wt%. [Display omitted] [ABSTRACT FROM AUTHOR]

• Two new V-shaped bis-coumarins with the benzophenone-imbedded triptycene and carbazole were synthesized. • These compounds exhibited strong green emission with PLQY of 0.90 and 0.94 in dichloromethane solution. • The device of the compound with the benzophenone-imbedded carbazole showed CE max = 8.94 cd/A, EQE max = 2.66 %. Two new V-shaped bis-coumarins (VBC) with the benzophenone-imbedded triptycene and carbazole, VBC CO-TTC and VBC CO Cz, were synthesized and characterized by NMR (1H and 13C), high resolution mass spectrometry and elemental analysis, and their thermal stabilities and photophysical and electrochemical properties were systematically studied. They exhibited strong green emission with high fluorescence quantum yield of 90.4 % and 93.65 % in dichloromethane solution, respectively. The combination of theoretical research and experimental data revealed the structure-property relationship of the functional groups grafted onto the V-shaped bis-coumarins. Moreover, the doped devices treated with the blend of CBP:VBC derivatives as the emitting layers showed green emission, in which the VBC CO Cz doped devices exhibited an maximum external quantum efficiency (EQE max) of 2.66 %, while the VBC CO-TTC doped devices showed an EQE max of 1.79 %, at the doping concentration of 5 wt%. [Display omitted] [ABSTRACT FROM AUTHOR]