Abstract
We demonstrate the fabrication of highly efficient solution‐processed fluorescent polymer and phosphorescent small‐molecule tandem organic light‐emitting devices (OLEDs) comprising two light‐emitting units (LEUs) and a charge generation layer (CGL). The phosphomolybdic acid or poly(3,4‐ethylenedioxythiophene) mixed with poly(styrenesulfonate) (PEDOT:PSS) were used as a CGL. The bilayer of zinc oxide (ZnO) and polyethylenimine ethoxylated (PEIE) serves as a solution‐processed electron injection layer (EIL). Development of these highly efficient solution‐processed tandem OLEDs paves the way to printable and low‐cost white lightings source.
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