Solution-processed white phosphorescent tandem organic light-emitting devices.

Chiba, Takayuki; Pu, Yong-Jin; Kido, Junji · Adv Mater · 2015

basic_science · Level V

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Abstract

Solution-processed phosphorescent tandem organic light-emitting devices (OLEDs) exhibit extremely high efficiencies (94 cd A(-1) ) and 26% external quantum efficiency (EQE) at 5000 cd m(-2) for green phosphorescent devices and 69 cd A(-1) and 28% EQE at 5000 cd m(-2) for white phosphorescent devices. Development of these highly efficient solution-processed tandem-OLEDs with inverted device structure paves the way to printable, low-cost, and large-area white lighting.