Formation of a MgAu alloy Cathode by Photolithography and the Application for Organic Light-Emitting Diodes and Organic Field-effect Transistors

Takahito Oyamada, Hiroyuki Sasabe, Chihaya Adachi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

To realize an efficient electron injection electrode into organic layers by photolithography, we form a MgAu alloy electrode which has capability of low work function and high durability for humidity and organic solvents during photolithography process. The MgAu alloy thin film shows a work function of 3.7eV which is comparable with that of a neat Mg layer and 0.8eV lower than that of a neat Au layer. The low work function of 3.7eV was maintained even after the photolithography process, suggesting excellent stability for the solvent treatments. We examine a MgAu alloy comb bottom electrode for organic field-effect transistor (OFET) and successfully obtain FET operation of n-type driving. We also demonstrate efficient electron injection characteristics of a MgAu alloy cathode in organic light-emitting diodes (OLEDs). The MgAu alloy cathode can inject electrons efficiently similar to the conventional MgAg cathode.

Original languageEnglish
Pages (from-to)1219-1223
Number of pages5
JournalIEEJ Transactions on Electronics, Information and Systems
Volume124
Issue number6
DOIs
Publication statusPublished - Jan 1 2004
Externally publishedYes

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Organic field effect transistors
Organic light emitting diodes (OLED)
Photolithography
Cathodes
Electron injection
Electrodes
Field effect transistors
Organic solvents
Atmospheric humidity
Durability
Thin films
Electrons

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

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AU - Adachi, Chihaya

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