Efficient red electroluminescence from diketopyrrolopyrrole copolymerised with a polyfluorene
Artikel i vetenskaplig tidskrift, 2013

We report the synthesis, characterization, and device incorporation of copolymers based on a common green-emitting polyfluorene but containing a small proportion of a low energy gap donor-acceptor-donor unit for red emission in photo- and electroluminescence. At just 1%-3% random incorporation, the low-gap unit is not present on all chains, yet we demonstrate that efficient charge and energy transfer can yield electroluminescent devices with 1% quantum efficiency and a color that can be tuned by adjusting the density of low-gap units to achieve primary red (National Television System Committee). The high current density tail off in the efficiency is reduced by replacing the hole-injection layer with a photochemically cross-linked electron-blocking layer.


O. Fenwick

University College London (UCL)

Sandra Fusco

Chalmers, Kemi- och bioteknik, Industriell Bioteknik

T. N Baig

University College London (UCL)

F. Di Stasio

University College London (UCL)

Timothy Steckler

Chalmers, Kemi- och bioteknik, Polymerteknologi

Patrik Henriksson

Chalmers, Kemi- och bioteknik, Polymerteknologi

C. Flechon

University College London (UCL)

Mats Andersson

Chalmers, Kemi- och bioteknik, Polymerteknologi

F. Cacialli

University College London (UCL)

APL Materials

2166-532X (eISSN)

Vol. 1 3 Art. no. 032108- 032108





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