Color-variable highly efficient organic electrophosphorescent diodes manipulating molecular exciton and excimer emissions (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Color-variable highly efficient organic electrophosphorescent diodes manipulating molecular exciton and excimer emissions (Articolo in rivista) (literal)

Anno

• 2009-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1063/1.3086900 (literal)

Alternative label

• M. Cocchi, J. Kalinowski, V. Fattori, J. A. Gareth Williams, and L. Murphy (2009)
  Color-variable highly efficient organic electrophosphorescent diodes manipulating molecular exciton and excimer emissions
  in Applied physics letters
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• M. Cocchi, J. Kalinowski, V. Fattori, J. A. Gareth Williams, and L. Murphy (literal)

Pagina inizio

• 073309 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 94 (literal)

Rivista

• Applied physics letters (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 3 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 7 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• M. Cocchi, V. Fattori; CNR, Inst Organ Photosynth & Photoreact, I-40129 Bologna, Italy J. Kalinowski; Gdansk Univ Technol, PL-80952 Gdansk, Poland JAG Williams, L Murphy; Univ Durham, Dept Chem, Durham DH1 3LE, England (literal)

Titolo

• Color-variable highly efficient organic electrophosphorescent diodes manipulating molecular exciton and excimer emissions (literal)

Abstract

• A simple way of tuning the emission color and electroluminescence efficiency from vacuum-deposited emitters of phosphorescent organic light emitting diodes (LEDs) is demonstrated. For each color a single-emissive layer consisting of a blend of two materials, one of Pt(N(and)C(and)N) complex series [where (N(and)C(and)N)=di(2-pyridinyl)benzene-based tridentate ligands] as either the low-concentration bluish green (molecular) phosphorescence emitter or high-concentration red (excimer) phosphorescence emitter, and (4,4('),4(')-tris(N-carbazolyl-triphenylamine) as the host was employed. By adjusting the relative amount of blue and red emissive species, the color of the light emission was tuned from bluish green through green and white up to red. Very high external quantum efficiency (up to 18.3 +/- 0.5%) and current efficiency (up to 44.8 +/- 0.5 cd/A) at similar to 500 cd/m(2) four-layer devices were achieved with white and greenish light emitting layers, respectively. It is found that the introduction of electron-withdrawing fluorine atoms at the central ring and electron-donating groups at the lateral rings of the Pt complex leads to a blueshift in the molecular and excimer emissions, respectively. This allows to refine colors and optimize the efficiency of the LEDs by selecting suitable substituents. (literal)

Prodotto di

• Materiali Avanzati per la COnversione di energia Luminosa (MACOL) (PM.P04.010.001) (Modulo)
• Institute for organic syntheses and photoreactivity (ISOF) (Istituto)

Autore CNR

• MASSIMO COCCHI (Unità di personale interno)
• VALERIA FATTORI (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Color-variable highly efficient organic electrophosphorescent diodes manipulating molecular exciton and excimer emissions" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute for organic syntheses and photoreactivity (ISOF) (Istituto)
• Materiali Avanzati per la COnversione di energia Luminosa (MACOL) (PM.P04.010.001) (Modulo)

Autore CNR di

• MASSIMO COCCHI (Unità di personale interno)
• VALERIA FATTORI (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Applied physics letters (Rivista)

Insieme di parole chiave di

• Keywords of "Color-variable highly efficient organic electrophosphorescent diodes manipulating molecular exciton and excimer emissions" (Insieme di parole chiave)