Fabrication of organic light-emitting devices comprising stacked light-emitting units by solution-based processes.

Pu, Yong-Jin; Chiba, Takayuki; Ideta, Kazushige; Takahashi, Shogo; Aizawa, Naoya; Hikichi, Tatsuya; Kido, Junji · Adv Mater · 2015

basic_science · Level V

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Abstract

Multi-organic light-emitting devices comprising two light-emitting units stacked in series through a charge-generation layer are fabricated by solution processes. A zinc oxide nanoparticles/polyethylene-imine bilayer is used as the electron-injection layer and phosphomolybdic acid is used as the charge-generation layer. Appropriate choice of solvents during spin-coating of each layer ensures the nine-layered structure fabricated by solution processes.