Journal
APPLIED PHYSICS LETTERS
Volume 89, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2236104
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The effect of Ni/Au metal contact on the carrier injection and the electroluminescence of silicon quantum dot light-emitting diodes (LEDs) was investigated. An LED with an annealed Ni/Au contact at 400 degrees C in air showed a lower threshold voltage compared to that of an as-deposited Ni/Au contact by forming a nickel silicide, which has a lower work function than Ni at the interface between metal layers and silicon nitride. The optical output power of the LED with the annealed Ni/Au contact was also increased due to a highly transparent NiO layer and a lowly resistant Au layer. (c) 2006 American Institute of Physics.
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