基于BCzVB的高效非掺杂蓝色有机电致发光器件  

Highly efficient non-doped blue organic electroluminescent devices based on BCzVB

作　　者：邹文静 吴有智[1] 张材荣[2] ZOU Wen-jing;WU You-zhi;ZHANG Cai-rong(School of Materials Science&Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China;School of Science,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州理工大学理学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2024年第3期21-26,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(11964016)。

摘　　要：以超薄插入方式制备了基于BCzVB(1,4-bis[2-(3-N-ethylcarbazoryl)vinyl]benzene)的高效非掺杂蓝色有机电致发光器件.器件的结构为ITO/MoO_(3)/TAPC(1,1-bis((di-4-tolylamino)phenyl)cyclohexane,50 nm)/BCzVB(x nm)/CBP(4,4’-N,N’-dicarbazole-biphyenyl,20 nm)/BCzVB(x nm)/TPBi(1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene,20 nm)/LiF(1.5 nm)/Al.当BCzVB厚度x为0.3 nm时,器件的最高亮度为12800 cd/cm^(2),最高外量子效率为2.1%(电流效率2.8 cd/A),CIE色坐标为(0.15,0.17).通过优化空穴注入层MoO_(3)的厚度,器件的最高亮度和外量子效率分别达到了14200 cd/cm^(2)和4.2%(电流效率为5.66 cd/A),外量子效率提升了一倍.这远超目前报道的基于BCzVB蓝色OLED的最高效率.Efficient non-doped blue organic light-emitting device with a structure of ITO/MoO_(3)/TAPC(1,1-bis((di-4-tolylamino)phenyl)cyclohexane,50 nm)/BCzVB(1,4-bis[2-(3-N-ethylcarbazoryl)vinyl]benzene,x nm)/CBP(4,4’-N,N’-dicarbazole-biphyenyl,20 nm)/BCzVB(x nm)/TPBi(1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene,20 nm)/LiF(1.5 nm)/Al were reported,in which two ultrathin layers of BCzVB as blue emitters were located at both the sides of ambipolar material CBP.When the thickness of BCzVB is 0.3 nm,the maximum luminance and external quantum efficiency are 12800 cd/cm^(2)and 2.1%(current efficiency is 2.8 cd/A),respectively,and CIE-1931 coordinate is(0.15,0.17).The device performance is further improved by optimizing the thickness of the hole injection layer MoO_(3).The maximum luminance and external quantum efficiency reach 14200 cd/cm^(2)and 4.2%(5.66 cd/A),respectively,which is so far the highest efficiency for BCzVB based blue OLED reported in the literature.

关 键 词：荧光 有机电致发光器件 BCzVB 非掺杂 蓝色 

分 类 号：TN383.1[电子电信—物理电子学] TN304.5