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 Organic light emitting diodes with europium (III) emissive layers based on β-diketonate complexes: The influence of the central ligand
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/6102

title: Organic light emitting diodes with europium (III) emissive layers based on β-diketonate complexes: The influence of the central ligand
authors: Santos, G.
Fonseca, F.J.
Andrade, A.M.
Deichmann, V.
Akcelrud, L.
Braga, S.S.
Coelho, A.C.
Gonçalves, I.S.
Peres, M.
Simões, W.
Monteiro, T.
Pereira, L.
keywords: Sensors
Thin film transistors
Electroluminescence
Luminescence
Photoconductivity
issue date: May-2008
publisher: Elsevier
abstract: This work shows a comparative study of organic light emitting diodes based on four different europium complexes with the general formula, Eu(CLs)3bipyridine, where the central ligands are DBM [tris(dibenzoylmethane)], TTA [tris(1-(2-thieneyl)-4,4,4-trifluoro-1,3-butanedione)], NTA [tris(1-(2-naphthoyl)-3,3,3-trifluoroacetone)] and BTA [tris(1-(2-benzoyl)-3,3,3-trifluoroacetone)]. All devices have a driving voltage of 14–16 V, a very low electrical current at normal operation (less than 1 mA) and a good Wall Plug Efficiency (up to near 10−3%). The most suitable central ligand was found to be DBM, with an optical power up to 200 nW (at 612 nm). The BTA exhibits the lowest stability under high applied voltages. The other central ligands have similar results among them. The electroluminescence spectra clearly show the europium ion transitions (with a strong 5D0 → 7F2 line) with a CIE color coordinate around (0.56, 0.34).
URI: http://hdl.handle.net/10773/6102
ISSN: 0022-3093
publisher version/DOI: dx.doi.org/10.1016/j.jnoncrysol.2007.10.097
source: Journal of Non-Crystalline Solids
appears in collectionsFIS - Artigos
I3N - Artigos

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