White organic light-emitting diodes based on electroplex from polyvinyl carbazole and carbazole oligomers blends |
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| Authors: | Chen Fei-Peng Xu Bin Zhao Zu-Jin Tian Wen-Jing Lü Ping |
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| Affiliation: | State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China; Department of Chemistry, Zhejiang University, Hangzhou 310027, China; Department of Chemistry, Konkuk University, Korea |
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| Abstract: | White organic light-emitting diodes with a blue emittingmaterial fluorene-centred ethylene-liked carbazole oligomer (Cz6F)doped into polyvinyl carbazole (PVK) as the single light-emittinglayer are reported. The optical properties of Cz6F, PVK, and PVK:Cz6Fblends are studied. Single and double layer devices are fabricatedby using PVK: Cz6F blends, and the device with the configuration ofindium tin oxide (ITO)/PVK:Cz6F/ tris(8-hydroxyquinolinate)aluminium(Alq3)/LiF/Al exhibits white light emission with CommissionInternationale de l'éclairage chromaticity coordinates of (0.30,0.33) and a brightness of 402~cd/m2. The investigation revealsthat the white light is composed of a blue--green emissionoriginating from the excimer of Cz6F molecules and a red emissionfrom an electroplex from the PVK:Cz6F blend films. |
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| Keywords: | white organic light-emitting diodes electroluminescence electroplex |
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