噻吩基联苯乙烯蓝色发光材料的合成与发光性能  

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

作　　者：柴生勇[1] 别国军[1] 徐新军[2] 刘波[1] 刘琼妮[1] 于贵[2] 刘云圻[2] 

机构地区：[1]西安近代化学研究所,陕西西安710065 [2]中国科学院化学研究所,北京100080

出　　处：《发光学报》2008年第5期815-820,共6页Chinese Journal of Luminescence

基　　金：陕西省科技计划资助项目(2004K07-G5)

摘　　要：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。A novel blue-light-emitting material of thiophenyl distyrylarylene , 4,4＇-bis（2-phenyl-2-（ thiophen- 2-yl） vinyl-l, 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 vohammetry. 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/m^2 at 19.5 V and a maximum efficiency of up to 1.73 ed/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.

关 键 词：噻吩基联苯乙烯 蓝光材料 有机电致发光 

分 类 号：O482.31[理学—固体物理] TN873.3[理学—物理]