文献类型：期刊文献

英文题名：A series of new bipolar CBP derivatives with introduction of a electron-deficient moiety for efficient green organic light-emitting diodes

作者：Wang, Yuanyuan[1,2];Song, Wenxian[1,2];Chen, Yi[1,2];Jiang, Yongxin[3];Mu, Haichuan[3];Huang, Jinhai[4];Su, Jianhua[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Sci, Dept Phys, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]Shanghai Taoe Chem Technol Co Ltd, Shanghai, Peoples R China

年份：2018

卷号：61

起止页码：142

外文期刊名：ORGANIC ELECTRONICS

收录：;EI(收录号：20182505342601);WOS:【SCI-EXPANDED(收录号:WOS:000438894600018)】；

基金：We acknowledge the support from National Natural Science Foundation of China (NSFC. 21790361).

语种：英文

外文关键词：CBP derivatives; Carbazole; Organic light-emitting diodes; Host materials; Bipolar; Electron-deficient moiety

摘要：By introducing pyridine, benzimidazole and triazine groups, three novel CBP derivatives host materials, 9,9 '-(2-(pyridin-3-yl)-[1,1 '-biphenyl]-4,4 '-diyl)bis(9H-carbazole) (CBPPY), 9,9 '-(4 ''-(1- phenyl-1H-benzo[d]imidazol-2-yl)-[1,1 ':2 ',1 ''-terphenyl]-4,4 '-diyl)bis(9H-carbazole) (CBPBM) and 9,9 '-(3 ''-(4,6-diphenyl-1,3,5-triazin-2-yl)-[1,1 ':2 ',1 ''-terphenyl]-4,4 '-diyl)Bis (9H-carbazole) (CBPTZ) were designed and synthesized. These three compounds exhibited high thermal stabilities, appropriate HOMO-LUMO energy levels and improved electroluminescent (EL) performance compared with CBP compound in Ir(ppy)(3) doped green organic light emitting diodes (OLED). In addition, devices based on CBPPY, CBPBM and CBPTZ showed lower driving voltages of 3.0, 2.6 and 2.5 V, and all devices achieved higher EL efficiencies. Especially, the CBPBM-based device reached the optimal external quantum efficiencies (EQE) of 18.9% with the maximum power efficiency (PE) of 56.71 m/W, which suggested that CBPPY, CBPBM and CBPTZ were promising bipolar host materials for green OLEDs.