基于BCzVB的高效非掺杂蓝色有机电致发光器件

兰州理工大学学报 ›› 2024, Vol. 50 ›› Issue (3): 21-26.

基于BCzVB的高效非掺杂蓝色有机电致发光器件

邹文静¹, 吴有智^*1, 张材荣²

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

收稿日期:2023-09-22 出版日期:2024-06-28 发布日期:2024-07-02
通讯作者: 吴有智(1965-),男,甘肃靖远人,博士,教授.Email:youzhiwu@163.com
基金资助:
国家自然科学基金(11964016)

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

ZOU Wen-jing¹, WU You-zhi¹, ZHANG Cai-rong²

1. School of Materials Science & Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. School of Science, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2023-09-22 Online:2024-06-28 Published:2024-07-02

摘要/Abstract

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/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- 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.

关键词: 荧光, 有机电致发光器件, BCzVB, 非掺杂, 蓝色

Abstract: 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 efficiencyare 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 device 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),respectively, which is so far the highest efficiency for BCzVB based blue OLED reported in the literature.

Key words: fluorescence, organic light-emitting devices, BCzVB, non-doped, blue

中图分类号:

邹文静, 吴有智, 张材荣. 基于BCzVB的高效非掺杂蓝色有机电致发光器件[J]. 兰州理工大学学报, 2024, 50(3): 21-26.

ZOU Wen-jing, WU You-zhi, ZHANG Cai-rong. Highly efficient non-doped blue organic electroluminescent devices based on BCzVB[J]. Journal of Lanzhou University of Technology, 2024, 50(3): 21-26.

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