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Enhanced Electron Injection into Inverted Polymer Light‐Emitting Diodes by Combined Solution‐Processed Zinc Oxide/Polyethylenimine Interlayers
Author(s) -
Höfle Stefan,
Schienle Alexander,
Bruns Michael,
Lemmer Uli,
Colsmann Alexander
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201304666
Subject(s) - materials science , oled , polyethylenimine , optoelectronics , electrode , diode , anode , polymer , solution process , oxide , zinc , nanotechnology , layer (electronics) , composite material , chemistry , biology , genetics , cell culture , metallurgy , transfection
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.