CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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White organic light-emitting diodes based on electroplex from polyvinyl carbazole and carbazole oligomers blends |
Chen Fei-Peng(陈飞鹏)a), Xu Bin(徐斌)a), Zhao Zu-Jin(赵祖金)b), Tian Wen-Jing (田文晶)a)†, LÜ Ping(吕萍)b), and Im Chanc) |
a State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China; b Department of Chemistry, Zhejiang University, Hangzhou 310027, Chinac Department of Chemistry, Konkuk University, Korea |
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Abstract White organic light-emitting diodes with a blue emitting material fluorene-centred ethylene-liked carbazole oligomer (Cz6F) doped into polyvinyl carbazole (PVK) as the single light-emitting layer are reported. The optical properties of Cz6F, PVK, and PVK:Cz6F blends are studied. Single and double layer devices are fabricated by using PVK: Cz6F blends, and the device with the configuration of indium tin oxide (ITO)/PVK:Cz6F/ tris(8-hydroxyquinolinate)aluminium (Alq3)/LiF/Al exhibits white light emission with Commission Internationale de l'éclairage chromaticity coordinates of (0.30, 0.33) and a brightness of 402 cd/m2. The investigation reveals that the white light is composed of a blue--green emission originating from the excimer of Cz6F molecules and a red emission from an electroplex from the PVK:Cz6F blend films.
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Received: 17 May 2009
Revised: 22 September 2009
Accepted manuscript online:
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PACS:
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85.60.Jb
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(Light-emitting devices)
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78.66.Qn
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(Polymers; organic compounds)
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85.60.Bt
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(Optoelectronic device characterization, design, and modeling)
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Fund: Project supported by the National
Basic Research Program of China (Grant No.~2009CB623605), the
National Natural Science Foundation of China (Grant No.~50673035),
Program for New Century Excellent Talents in Universities of
Ministry of Education, the 111 Project (Grant No.~B06009). |
Cite this article:
Chen Fei-Peng(陈飞鹏), Xu Bin(徐斌), Zhao Zu-Jin(赵祖金), Tian Wen-Jing (田文晶), LÜ Ping(吕萍), and Im Chan White organic light-emitting diodes based on electroplex from polyvinyl carbazole and carbazole oligomers blends 2010 Chin. Phys. B 19 037801
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