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

Hiroya Arai; Hajime Nakanotani; Kei Morimoto; Chihaya Adachi

doi:10.1116/1.4952408

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 journal › Article › peer-review

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 language	English
Article number	4952408
Journal	Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics
Volume	34
Issue number	4
DOIs	https://doi.org/10.1116/1.4952408
Publication status	Published - 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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title = "Magnesium-gold binary alloy for organic light-emitting diodes with high corrosion resistance",

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.",

author = "Hiroya Arai and Hajime Nakanotani and Kei Morimoto and Chihaya Adachi",

note = "Funding Information: This work was supported in part by the Center of Innovation (COI) Program from the Japan Science and Technology Agency (JST). The authors also thank W. J. Potscavage, Jr., for his assistance with preparation of this manuscript.",

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AU - Arai, Hiroya

AU - Nakanotani, Hajime

AU - Morimoto, Kei

AU - Adachi, Chihaya

N1 - Funding Information: This work was supported in part by the Center of Innovation (COI) Program from the Japan Science and Technology Agency (JST). The authors also thank W. J. Potscavage, Jr., for his assistance with preparation of this manuscript.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - 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.

AB - 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.

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