Magnesium-gold binary alloy for organic light-emitting diodes with high corrosion resistance

Hiroya Arai, Hajime Nakanotani, Kei Morimoto, Chihaya Adachi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The authors demonstrate a simple approach to obtain cathodes that have a high resistance against corrosion by water and oxygen and an air-stable work-function of -3.7 eV by doping 10 at. % of gold (Au) into a magnesium (Mg) base metal layer. Organic light-emitting diodes (OLEDs) with the Mg-Au cathodes achieved electroluminescence characteristics that are comparable to those of devices with conventional cathodes such as aluminum (Al) and Mg-silver (Ag). Although OLEDs with Al or Mg-Ag cathodes exhibited a significant reduction of their emissive area when operated in air, the emissive area of the OLEDs with Mg-Au cathodes decreased only 10% after 10 days of operation in ambient air without any specific encapsulation. These results suggest that Mg-Au cathodes can loosen the strict requirements for encapsulation, reducing the number of process steps and cost of OLED fabrication.

Original languageEnglish
Article number4952408
JournalJournal of Vacuum Science and Technology B: Nanotechnology and Microelectronics
Volume34
Issue number4
DOIs
Publication statusPublished - Jul 1 2016

Fingerprint

Gold alloys
gold alloys
Binary alloys
Organic light emitting diodes (OLED)
binary alloys
corrosion resistance
Magnesium
Corrosion resistance
magnesium
Cathodes
light emitting diodes
cathodes
Aluminum
Encapsulation
air
Air
aluminum
Electroluminescence
high resistance
Silver

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

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AU - Arai, Hiroya

AU - Nakanotani, Hajime

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AU - Adachi, Chihaya

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