Decoupling Charge Transport and Electroluminescence in a High Mobility Polymer Semiconductor.

Harkin, David J; Broch, Katharina; Schreck, Maximilian; Ceymann, Harald; Stoy, Andreas; Yong, Chaw-Keong; Nikolka, Mark; McCulloch, Iain et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

Fluorescence enhancement of a high-mobility polymer semiconductor is achieved via energy transfer to a higher fluorescence quantum yield squaraine dye molecule on 50 ps timescales. In organic light-emitting diodes, an order of magnitude enhancement of the external quantum efficiency is observed without reduction in the charge-carrier mobility resulting in radiances of up to 5 W str(-1) m(-2) at 800 nm.