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 journalArticlepeer-review

3 Citations (Scopus)


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
Issue number4
Publication statusPublished - Jul 1 2016

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


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