Highly efficient organic electrophosphorescent light-emitting diodes with a reduced quantum efficiency roll off at large current densities (Articolo in rivista)

Type
Label
  • Highly efficient organic electrophosphorescent light-emitting diodes with a reduced quantum efficiency roll off at large current densities (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.1646214 (literal)
Alternative label
  • M. Cocchi, V. Fattori, D. Virgili, C. Sabatini, P. Di Marco, M. Maestri, J. Kalinowski (2004)
    Highly efficient organic electrophosphorescent light-emitting diodes with a reduced quantum efficiency roll off at large current densities
    in Applied physics letters
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. Cocchi, V. Fattori, D. Virgili, C. Sabatini, P. Di Marco, M. Maestri, J. Kalinowski (literal)
Pagina inizio
  • 1052 (literal)
Pagina fine
  • 1054 (literal)
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  • 84 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 3 (literal)
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  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • J. Kalinowski; Gdansk Tech Univ, Dept Mol Phys, PL-80952 Gdansk, Poland - M. Cocchi, V. Fattori, D. Virgili, C. Sabatini, P. Di Marco; Natl Res Council Italy CNR ISOF, Inst Organ Synth & Photoreact, I-40129 Bologna, Italy - M. Maestri; Univ Bologna, Dept Chem, I-40126 Bologna, Italy (literal)
Titolo
  • Highly efficient organic electrophosphorescent light-emitting diodes with a reduced quantum efficiency roll off at large current densities (literal)
Abstract
  • High efficiency electrophosphorescence (EPH) in organic light-emitting devices was achieved employing a cyclometallated platinum [Pt(II)]-complexes-doped blend of N,N-'-diphenyl-N,N-'-bis(3-methylphenyl)-1,1'-biphenyl-4,4' diamine and bisphenol-A-polycarbonate as the emitting layer. Using bis-[2-(5-trimethylsilanyl-thiophen-2-yl)-pyridine] Pt(II) [Pt(thpy-SiMe3)] as a phosphorescent dopant, a maximum EPH external quantum efficiency of 11.5+/-0.5% photons/carrier was achieved with a three-fold lower roll-off factor at increasing current density, compared with commonly used Pt-based dye 2,3,7,8,12,13,17,18-octaethyl-21H, 23H-porphine platinum (II) (PtOEP). The emission spectrum of the device peaking at congruent to590 nm shifts the chromaticity coordinates toward the orange relative to the PtOEP-based devices. (literal)
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