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Light Emitting Vacuum Evaporated Devices Based on Triaryldiamine Materials and 8-Hydroxyquinoline Complexes of Al(III) and Zn(II)

Published online by Cambridge University Press:  21 March 2011

Gabriele Giro ,
Massimo Cocchi ,
Piergiulio Di Marco ,
Valeria Fattori ,
Pasquale Dembech ,
Gaia Fabbri  and
Mauro Ghedini
Gabriele Giro
Affiliation:
CNR-FRAE, Area della Ricerca, Via P. Gobetti 101, 40129-Bologna, Italy
Massimo Cocchi
Affiliation:
CNR-FRAE, Area della Ricerca, Via P. Gobetti 101, 40129-Bologna, Italy
Piergiulio Di Marco
Affiliation:
CNR-FRAE, Area della Ricerca, Via P. Gobetti 101, 40129-Bologna, Italy
Valeria Fattori
Affiliation:
CNR-FRAE, Area della Ricerca, Via P. Gobetti 101, 40129-Bologna, Italy
Pasquale Dembech
Affiliation:
CNR-ICoCEA, Area della Ricerca, Via P. Gobetti 101, 40129-Bologna, Italy
Gaia Fabbri
Affiliation:
CNR-ICoCEA, Area della Ricerca, Via P. Gobetti 101, 40129-Bologna, Italy
Mauro Ghedini
Affiliation:
Dipartimento di Chimica, Universita` della Calabria,-Cosenza, Italy
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Abstract

Vapor deposited double-layer (DL) organic light emitting diodes (OLEDs) based on the combination of materials belonging to the triaryldiamine family as hole transporting materials (HTM) and metal complexes of 8-hydroxyquinoline as electron transporting materials (ETM) have been characterized. As HTM N,N'-bis(diphenyl-4-yl)-N,N'-diphenyl-benzidine (NBDB), N,N'-(naphthalen-1-yl)-N,N'-diphenyl-benzidine (NPB) or N,N'-diphenyl-N,N'-(3-methylphenyl)-1,1'-diphenyl-4,4'-diamine (TPD) were used. As ETM tris-(8-hydroxyquinolinate)-Al(III) (Alq3) or bis-(8-hydroxyquinolinate)-Zn(II) (Znq2) were used. The typical cell configuration was: ITO/HTM/ETM/Ca,Ag. A comparison of the electrical and light emitting features between devices constructed with the new molecule NBDB and NPB or TPD was made, with the aim of improving their efficiency and stability.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 598: Symposium BB – Electrical, Optical, & Magenetic Properties...V , 1999 , BB11.2
Copyright
Copyright © Materials Research Society 1999

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