Improvement of the electrical characteristics of polymer electroluminescent structures by using spray-coating technology / Mariya Petrova Aleksandrova in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 2 (03/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 2 (03/2012) . - p. 157–161 Titre : Improvement of the electrical characteristics of polymer electroluminescent structures by using spray-coating technology Type de document : texte imprimé Auteurs : Mariya Petrova Aleksandrova, Auteur Année de publication : 2012 Article en page(s) : p. 157–161 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces Dépôt par pulvérisation Electroluminescence Polyphénylène vinylène Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : In this article, polyphenylenevinylene derivative (poly(9,9-dihexyl-9H-fluorene-2,7-diyl-vinylene)) (PPV-D) thin films were deposited by spray deposition and spin-coating. Film morphology was investigated by scanning electron microscopy images and surface profile diagrams. The traps concentration depending on the deposition method was evaluated based on current–voltage characteristics of ITO/PPV-D/Al structures measured at different temperatures. Brightness–voltage characteristics of the structures containing spray deposited and spin-coated PPV-D films with the same thickness were measured. The film surface at spray deposition tends to be uniform and smoother than the spin-coated one. The structure with sprayed polymer layer showed higher maximal trap factor (0.94 × 10?3 vs 0.83 × 10?3 for spin-coating), which is evidence for less defects in the bulk and presence of more free carriers, contributing to the conduction and the radiative recombination. Twice-higher luminance and 1.4 V lower turn-on voltage were achieved, using spray deposition in comparison with the spin-coating technique. The spray technique for polymer deposition is a very powerful tool for the preparation of cost effective organic-based devices with improved electrical characteristics and efficiency. DOI : 10.1007/s11998-009-9220-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-009-9220-2.pdf?pdf=button Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14366 [article]

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