title: Linear and cyclic porphyrin hexamers as near-infrared emitters in organic light-emitting diodes.
abstract: Here we report organic light-emitting diodes incorporating linear and cyclic porphyrin hexamers which have red-shifted emission (λ(PL) = 873 and 920 nm, respectively) compared to single porphyrin rings as a consequence of their extended π-conjugation. We studied the photoluminescence and electroluminescence of blends with poly(9,9'-dioctylfluorene-alt-benzothiadiazole), demonstrating a high photoluminescence quantum efficiency of 7.7% for the linear hexamer when using additives to prevent aggregation and achieving high color purity near-infrared electroluminescence.
authors: Department of Physics and Astronomy and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, UK.
authors: Oliver
authors: O
authors: Fenwick
authors: Johannes K
authors: JK
authors: Sprafke
authors: Jonathan
authors: J
authors: Binas
authors: Dmitry V
authors: DV
authors: Kondratuk
authors: Francesco
authors: F
authors: Di Stasio
authors: Harry L
authors: HL
authors: Anderson
authors: Franco
authors: F
authors: Cacialli