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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’ ’ Eclairage chromaticity coordinates of(0.30,0.33) and a brightness of 402 cd/m 2.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.
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. 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) aluminum (Alq3) Al exhibits white light emission with Commission Internationale de l ’’ Eclairage chromaticity coordinates of (0.30, 0.33) and a brightness of 402 cd / m 2. 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.