期刊
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
卷 34, 期 4, 页码 -出版社
A V S AMER INST PHYSICS
DOI: 10.1116/1.4952408
关键词
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资金
- Center of Innovation (COI) Program from the Japan Science and Technology Agency (JST)
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 similar to 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. (C) 2016 American Vacuum Society.
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