An OLED is an abbreviation for Organic Light-Emitting Diodes.
Explanation:
It is basically a type of light-emitting diode or LED that has an emissive electroluminescent layer that acts as a film of organic compounds and is responsible for emitting light when an electric current is applied.
if you only get to use one notecard, I would say just the source information but if you get more than one then do one or two facts or thoughts per notecard:3
