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Chin. Phys. B, 2010, Vol. 19(3): 037801    DOI: 10.1088/1674-1056/19/3/037801
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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
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.
Keywords:  white organic light-emitting diodes      electroluminescence      electroplex  
Received:  17 May 2009      Revised:  22 September 2009      Accepted manuscript online: 
PACS:  85.60.Jb (Light-emitting devices)  
  78.66.Qn (Polymers; organic compounds)  
  85.60.Bt (Optoelectronic device characterization, design, and modeling)  
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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