A novel blue-light-emitting material of thiophenyl distyrylarylene

4

4'-bis(2-phenyl-2-(thiophen-2-yl)vinyl-1

1'-biphenyl was designed and synthesized.Its structure was determined by IR

1

H NMR and elementary analysis.It's HOMO

LUMO and luminescence characteristic was studied by UV-V is absorption spectra

fluorescence spectra and cyclic voltammetry.The HOMO energy and LUMO energy of TPVBi is-5.55 eV and-2.67 eV

respectively.TPVBi emits blue fluorescence with a peak wavelength at 451 nm in solution and with a peak wavelength at 464 nm in film.Organic light-emitting-diode with a structure of ITO/CuPc(10 nm)/NPB(30 nm)/TPVBi(35 nm)/TPBi(35 nm)/Al(100 nm) was prepared and electrolum inescence properties were studied.The device exhibited a maximum luminance of up to 1782.3 cd/m

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at 19.5 V and a maximum efficiency of up to 1.73 cd/A at a current density of 15.69 mA/cm

2

.The CIE chromaticity coordinates of the light emitted from the device are x=0.25

y=0.40.