噻吩基联苯乙烯蓝色发光材料的合成与发光性能

设计并合成了新型含噻吩基团的联苯乙烯类蓝色有机电致发光材料4,4′-双(2-苯基-2-(2-噻吩)乙烯基)-1,1′-联苯(TPVBi),通过红外、核磁共振、元素分析对其结构进行了表征。利用紫外可见吸收光谱、荧光光谱和循环伏安法等研究了其HOMO、LUMO能级及发光性能。TPVBi溶液的荧光发射峰值波长为451nm,薄膜的荧光光谱最大发射波长为464nm。循环伏安测得其氧化峰电位为1.227V。TPVBi的HOMO能级为-5.55eV,LUMO能级为-2.67eV。以TPVBi作为发光层制作了结构为ITO/CuPc(10nm)/NPB(30nm)/TPVBi(35nm)/TPBi(35nm)/Al(100nm)的有机发光二极管器件,并研究了该器件的电致发光性能。该器件在电压为19.5V时,达到最大亮度1782.3cd/m2,在电流密度为15.69mA/cm2时,最大电流效率为1.73cd/A;器件的发光CIE色坐标为x=0.25,y=0.40。

Synthesis and Luminescence of a Blue-light-emitting Material of Thiophenyl Distyrylarylene

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,1H NMR and elementary analysis.It's HOMO,LUMO and luminescence characteristic was studied by UV-Vis 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 electroluminescence properties were studied.The device exhibited a maximum luminance of up to 1 782.3 cd/m2 at 19.5 V and a maximum efficiency of up to 1.73 cd/A at a current density of 15.69 mA/cm2.The CIE chromaticity coordinates of the light emitted from the device are x=0.25,y=0.40.