Decoupling Charge Transport and Electroluminescence in a High Mobility Polymer Semiconductor

David J Harkin; Katharina Broch; Maximilian Schreck; Harald Ceymann; Andreas Stoy; Chaw-Keong Yong; Mark Nikolka; Iain McCulloch; Natalie Stingelin; Christoph Lambert; Henning Sirringhaus

doi:10.1002/adma.201600851

Decoupling Charge Transport and Electroluminescence in a High Mobility Polymer Semiconductor

Adv Mater. 2016 Aug;28(30):6378-85. doi: 10.1002/adma.201600851. Epub 2016 May 11.

Affiliations

¹ Department of Physics, University of Cambridge, Cambridge, CB3 0HE, UK.
² Institut für Organische Chemie, Universität Würzburg, 97074, Würzburg, Germany.
³ Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
⁴ Department of Materials, Imperial College London, London, SW7 2AZ, UK.

PMID: 27166597
DOI: 10.1002/adma.201600851

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.

Keywords: NIR; energy transfer; fluorescence; organic LEDs.