Highly Efficient Color Stable Inverted White Top‐Emitting OLEDs with Ultra‐Thin Wetting Layer Top Electrodes

An ultra-thin MoO3–Au–Ag wetting layer metal electrode is investigated to eliminate present optical and electrical limitations of inverted top-emitting OLEDs. Its high transmittance suppresses microcavity effects and the MoO3 hole injection layer compensates limited charge injection from the top contact. Overall, an extensive approach is presented to solve the key problems of top-emitting OLEDs in general.