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Foi sintetizado o complexo tris(tenoiltrifluoracetonato)(2,2'-bipiridina)európio(III), Eu(tta) 3 bipy, e suas características luminescentes foram avaliadas. A emissão de blendas deste complexo com poli(9-vinil carbazol) (PVK-Eu), variando a composição do Eu(tta) 3 bipy de 1% até 8% em massa (Eu(tta) 3 bipy/PVK, m/m), apresentou picos de fotoluminescência em 425 nm e 613 nm, com intensidades dependentes da composição da blenda. Dispositivos emissores de luz (LED's) de dupla camada, com configuração ITO/PEDOT-PSS/blends/Ca-Al apresentaram emissão de luz vermelha com voltagem mínima de 9 V e pico máximo em 617 nm; eficiência na luminescência foi de 0.04 cd A -1 . Medidas resolvidas no tempo indicaram que a microestrutura da matriz polimérica não afetou as propriedades eletro-ópticas das blendas.The complex tris(thenoyltrifluoracetonate)(2,2'-bipyridine)europium(III), Eu(tta) 3 bipy, was synthesized and assessed for luminescence behavior. The emission of its blends with poly(9-vinyl carbazole) (PVK-Eu), varying in composition from 1 to 8% (Eu(tta) 3 bipy/PVK, m/m) showed PL at 425 nm and at 613 nm, with intensities which depended on the blend composition. Double-layer LED devices with configuration ITO/PEDOT-PSS/Blend/Ca-Al emitted red light with turn-on voltages of 9 V and emission maxima at 617 nm; its luminance efficiency was 0.04 cd A -1 . Time resolved measurements indicated that the microstructure of the matrix had practically no effect on the electro-optical properties of the blends.

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The synthesis, structural characteristics, and photo‐ and electroluminescent properties of a soluble light‐emitting copolymer built up of regularly alternating segments of 1,4‐dihexyloxybenzene and 2,2′‐bipyridyl (PBPyDHB) are described and discussed. Optical properties of the polymer were investigated in solution and solid‐state conditions, demonstrating that in film form the predominant emission centers are inter‐macromolecular aggregates, either in photo‐ or electroluminescence. Thermogravimetric analysis indicates that PBPyDHB has very high thermal stability, with a maximum decomposition rate around 400 °C and onset with 10% mass loss at 342 °C. The polymer is a blue emitter, and the good solubility, thermal behavior, and electroluminescence properties make it a promising material for electro‐optical applications. Copyright © 2006 Society of Chemical Industry