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文章名称：Synthesis and characterization of novel 2,7-carbazole derivatives for blue light-emitting diodes. 期刊名：J Mater Sci: Mater Electron |
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SCI 文献信息 文献类型:Article 语种:English 入藏号: WOS:000333050400056 ISSN: 0957-4522 电子 ISSN: 1573-482X EI Accession number: 20141417533549 Title: Synthesis and characterization of novel 2,7-carbazole derivatives for blue light-emitting diodes Authors: Li, Jingtong1; Liu, Ransheng1 Email author rsliu@163.com; Zhao, Zengdian1 Email author zdz1266@126.com; Zhou, Ziyan1 Author affiliation: 1 School of Chemical Engineering, Shandong University of Technology, Zibo 255049, China Corresponding author: Liu, R. (rsliu@163.com) Source title: Journal of Materials Science: Materials in Electronics Abbreviated source title: J Mater Sci Mater Electron Volume: 25 Issue: 4 Issue date: April 2014 Publication year: 2014 Pages: 1970-1975 Language: English ISSN: 09574522 E-ISSN: 1573482X Document type: Journal article (JA) Publisher: Springer New York LLC Abstract: Two 2,7-carbazole based low molecular weight derivatives, 9-hexyl-N 2,N 2,N 7,N 7-tetraphenyl-carbazole- 2,7-diamine (TPCA) and 9-hexyl-9H-9,2:7,9-tercarbazole (HTC), were synthesized by Buchwald and Ullmann coupling reactions, respectively. The optical, electrochemical and thermal properties of this two analogous small molecule hosts have been characterized. The HOMO level of TPCA and HTC were -5.25 and -5.29 eV indicating good hole-transporting properties. Both of the compounds emit deep blue light peaked at 410 and 428 nm in solid state. According to the measurement, the luminescence quantum yield of TPCA is 0.98, almost 1.7 times higher than that of HTC (0.59) in dilute THF solution. The geometrical and electronic properties of the compounds were studied using density functional theory calculations. The studies mentioned above indicate that both TPCA and HTC are suitable for active materials of blue light-emitting diodes. © 2014 Springer Science+Business Media New York. Number of references: 17 Main heading: Light emitting diodes Controlled terms: Chemical bonds - Electronic properties - Polycyclic aromatic hydrocarbons - Supercomputers Uncontrolled terms: 2 , 7-carbazole derivatives - Blue light-emitting - Hole-transporting property - Low molecular weight - Luminescence quantum yields - Small molecules - Synthesis and characterizations - Ullmann coupling reaction Classification code: 701.1 Electricity: Basic Concepts and Phenomena - 722.4 Digital Computers and Systems - 741.1 Light/Optics - 801.4 Physical Chemistry - 804.1 Organic Compounds DOI: 10.1007/s10854-014-1831-4 Database: Compendex Compilation and indexing terms, © 2013 Elsevier Inc. |
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