Highly flexible and transparent InZnSn Ox AgInZnSn Ox multilayer electrode for flexible organic light emitting diodes

Kwang Hyuk Choi, Ho Jun Nam, Jin A. Jeong, Sung Woo Cho, Han Ki Kim, Jae Wook Kang, Do Geun Kim, Woon Jo Cho

Research output: Contribution to journalArticlepeer-review

184 Scopus citations

Abstract

By inserting a very thin layer of Ag between two layers of amorphous indium zinc tin oxide (IZTO), we fabricated a highly flexible, low resistance, and highly transparent IZTO-Ag-IZTO multilayer electrode on a polyethylene terephthalate (PET) substrate. Due to surface plasmon resonance (SPR) effects and the ductility of the Ag layer, the IZTO-Ag-IZTO electrode exhibited a low sheet resistance of 4.99 sq. and a high transparency of 86% as well as superior flexibility despite the very thin thickness of the IZTO layer (30 nm). It was found that the transition of the Ag layer from distinct islands to a continuous film occurred at a critical thickness (∼14 nm). Continuity of the Ag film is very important for SPR in IZTO-Ag-IZTO electrode. The current density-voltage-luminance characteristics of flexible organic light emitting diodes (OLEDs) fabricated on IZTO-Ag-IZTO/PET were better than those of flexible OLEDs fabricated on an ITO/PET substrate due to the low sheet resistance and high work function of the IZTO.

Original languageEnglish
Article number223302
JournalApplied Physics Letters
Volume92
Issue number22
DOIs
StatePublished - 2008
Externally publishedYes

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