Transparent organic light-emitting devices with LiF/Yb : Ag cathode

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)6975-6977
Journal / PublicationThin Solid Films
Volume515
Issue number17
Publication statusPublished - Jun 2007

Abstract

Highly transparent organic light-emitting devices (TOLEDs) based on LiF/Yb:Ag cathode are reported. The device with a structure of Indium tin oxide/N,N′-bis-(1-naphthyl)-N,N′-diphenyl-1,1′-biph-enyl-4, 4′-diamine (50 nm)/tris (8-hydroxyquinoline) aluminum (50 nm)/LiF(0.5 nm)/Yb:Ag (15 nm, volume ratio 1:1) shows about the same luminances and spectra from both sides. At a current density of 20 mA/cm2, the luminance and electroluminescent efficiency of the top/bottom side are 165/167 cd/m2 and 0.825/0.835 cd/A, respectively. We attribute the characteristics to the high transmittance and low reflectivity of Yb:Ag cathode. The results suggest that LiF/Yb:Ag electrode can be used as an effective and stable cathode in TOLEDs or top-emitting OLEDs. © 2007 Elsevier B.V. All rights reserved.

Research Area(s)

  • Cathodes, Evaporation, Indium tin oxide, Ytterbium

Citation Format(s)

Transparent organic light-emitting devices with LiF/Yb : Ag cathode. / Xie, W. F.; Lau, K. C.; Lee, C. S.; Lee, S. T.

In: Thin Solid Films, Vol. 515, No. 17, 06.2007, p. 6975-6977.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review