| http://www.w3.org/ns/prov#value | - ssion type, after forming an electrode to match the work function of the organic light emitting unit 230 on the surface of the organic light emitting unit 230 using a material such as Li, Ca, LiF/Ca, LiF/AI, Al, Ag, Mg, or a compound of these metals, a transparent electrode may be formed on the electrode using ITO, IZO, ZnO, or In2 0 3.
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