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基于BCzVB的高效非掺杂蓝色有机电致发光器件

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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/MoO3/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-benzimi-dazol-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 12 800 cd/cm2,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MoO3的厚度,器件的最高亮度和外量子效率分别达到了14 200 cd/cm2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.
Highly efficient non-doped blue organic electroluminescent devices based on BCzVB
Efficient non-doped blue organic light-emitting device with a structure of ITO/MoO3/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 12 800 cd/cm2 and 2.1%(current efficiency is 2.8 cd/A),respectively,and CIE-1931 coordinate is(0.15,0.17).The de-vice performance is further improved by optimizing the thickness of the hole injection layer MoO3.The maximum luminance and external quantum efficiency reach 14 200 cd/cm2 and 4.2%(5.66 cd/A),respec-tively,which is so far the highest efficiency for BCzVB based blue OLED reported in the literature.

fluorescenceorganic light-emitting devicesBCzVBnon-dopedblue

邹文静、吴有智、张材荣

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兰州理工大学材料科学与工程学院,甘肃兰州 730050

兰州理工大学理学院,甘肃兰州 730050

荧光 有机电致发光器件 BCzVB 非掺杂 蓝色

国家自然科学基金

11964016

2024

兰州理工大学学报
兰州理工大学

兰州理工大学学报

CSTPCD北大核心
影响因子:0.57
ISSN:1673-5196
年,卷(期):2024.50(3)