文献类型：期刊文献

英文题名：Novel hole transport materials based on N,N′-disubstituted-dihydrophenazine derivatives for electroluminescent diodes

作者：Zheng, Zhiwen[1,2];Dong, Qingchen[3,4];Gou, Liao[1,2];Su, Jian-Hua[1,2];Huang, Jinhai[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Taiyuan Univ Technol, MOE Key Lab Interface Sci & Engn Adv Mat, Taiyuan 030024, Peoples R China;[4]Taiyuan Univ Technol, Res Ctr Adv Mat Sci & Technol, Taiyuan 030024, Peoples R China

年份：2014

卷号：2

期号：46

起止页码：9858

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20144600184173);WOS:【SCI-EXPANDED(收录号:WOS:000344998700009)】；

基金：Q. Dong thanks the financial support from the National Natural Foundation of China (Grant no.: 61307030), the Natural Science Foundation for Young Scientists of Shanxi Province, China (Grant no.: 2014021019-2), and the Outstanding Young Scholars Cultivating Program and the Qualified Personal Foundation of Taiyuan University of Technology (Grant no.: 2013Y003, tyut-rc201275a).

语种：英文

外文关键词：Cyclic voltammetry - Hole mobility - Single crystals - Optical properties - Tin oxides - Efficiency - Dihedral angle - Mass spectrometry - Crystal structure - Indium compounds - Organic light emitting diodes (OLED)

摘要：A series of novel hole transport materials for organic light-emitting diodes (OLEDs) based on 9,14-diphenyl-9,14-dihydrodibenzo[a, c] phenazine were synthesized and characterized by H-1 NMR and C-13 NMR, mass spectrometry and single crystal structure analysis methodologies. The crystal structures of three selected molecules reveal large dihedral angles between different functional units. The electro-optical properties of the materials were examined by UV-vis absorption, photoluminescence spectroscopy and cyclic voltammetry. The HOMO of the materials were between 4.83-5.08 eV, indicating a good match between the HOMO of indium tin oxide (ITO) and the HOMO of light-emitting layer, which renders the promising candidates as hole transport materials for organic light-emitting devices. In terms of the device with the structure of ITO/HTM (60 nm)/Alq(3) (50 nm)/LiF (1 nm)/Al (200 nm), the device b using N,N-diphenyl-4'-(14-phenyldibenzo[a,c] phenazin-9(14H)-yl)-[1,1'-biphenyl]-4-amine presented a maximum luminance of 17 437 cd m(-2) at 10.7 V and kept a high current efficiency (the maximum current efficiency is 2.25 cd A(-1)) at a high current density (>500 mA cm(-2)), which illustrates the exploited material possesses good hole transport and stable properties.