| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Efficient Green Organic Light-Emitting Devices Based on a Solution-Processable Starburst Molecule |
| ZHANG Xin-Wen1**, WANG Jian-Yun1, ZHAO Ling-Ling1, GUO Xin1, LAI Wen-Yong1**, HUANG Wei1,2 |
1Key Laboratory for Organic Electronics & Information Displays, Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023
2Institute of Advanced Materials, Nanjing University of Technology, Nanjing 211816
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| Cite this article: |
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ZHANG Xin-Wen, WANG Jian-Yun, ZHAO Ling-Ling et al 2013 Chin. Phys. Lett. 30 098501 |
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Abstract We develop high efficiency solution-processed pure green organic light-emitting devices using a starburst molecule 7,7',7"-(5,5,10,10,15,15-hexahexyl-10, 15-dihydro-5H-diindeno[1, 2-a:1', 2'-c]fluorene-2,7,12-triyl)tris(4-(4-(9H-carbazol-9-yl)phenyl)benzo[c][1,2,5]thiadiazole) (TRcz) doped 2-methyl-9,10-di(2-naphthyl)anthracene (MADN) as the emitting layers. The electroluminescence properties of the devices with different doping concentrations are investigated. With the increasing doping concentration from 0.5wt% to 5wt%, the maximum efficiency changes from 4.8 cd/A to 8.4 cd/A. Under the optimal concentration of 4wt%, the device shows pure green emission at 516 nm with a chromaticity coordinate of (0.30, 0.59) as well as a high brightness of 19900 cd/m2 and a high efficiency of 10.1 cd/A, which are better than 11490 cd/m2 and 4.2 cd/A obtained in the undoped device.
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Received: 05 June 2013
Published: 21 November 2013
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| PACS: |
85.60.Jb
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(Light-emitting devices)
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78.60.Fi
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(Electroluminescence)
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78.55.-m
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(Photoluminescence, properties and materials)
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81.15.-z
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(Methods of deposition of films and coatings; film growth and epitaxy)
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