Photo- and electroluminescent behavior of Eu3+ ions in blends with poly(vinyl-carbazole)

Journal of the Brazilian Chemical Society

Cirpan, A.¹  Novo, J.B.M.¹  Karasz, F. E.¹  Akcelrud, L.¹  Universidade Federal do Paraná, Curitiba, Brazil¹  University of Massachusetts, Amherst, USA¹  Deichmann, V.A.F.¹ 

关键词: europium;    PVK;    electroluminescence;   

DOI  :  10.1590/S0103-50532007000200013

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The complex tris(thenoyltrifluoracetonate)(2,2'-bipyridine)europium(III), Eu(tta)3bipy, 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)3bipy/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.

【 授权许可】

Unknown