Enhanced electron injection into inverted polymer light-emitting diodes by combined solution-processed zinc oxide/polyethylenimine interlayers

Stefan Höfle; Alexander Schienle; Michael Bruns; Uli Lemmer; Alexander Colsmann

doi:10.1002/adma.201304666

Enhanced electron injection into inverted polymer light-emitting diodes by combined solution-processed zinc oxide/polyethylenimine interlayers

Adv Mater. 2014 May;26(17):2750-4, 2618. doi: 10.1002/adma.201304666. Epub 2014 Mar 31.

Authors

Stefan Höfle¹, Alexander Schienle, Michael Bruns, Uli Lemmer, Alexander Colsmann

Affiliation

¹ Light Technology Institute, Karlsruhe Institute of Technology (KIT), Engesserstrasse 13, 76131, Karlsruhe, Germany.

PMID: 24687875
DOI: 10.1002/adma.201304666

Abstract

Inverted device architectures for organic light-emitting diodes (OLEDs) require suitable interfaces or buffer layers to enhance electron injection from highwork-function transparent electrodes. A solution-processable combination of ZnO and PEI is reported, that facilitates electron injection and enables efficient and air-stable inverted devices. Replacing the metal anode by highly conductive polymers enables transparent OLEDs.

Keywords: inverted device architecture; organic light emitting diode; solution processing; transparent; zinc oxide.

Publication types

Research Support, Non-U.S. Gov't