Linear and cyclic porphyrin hexamers as near infra-red emitters in organic light-emitting diodes

Oliver Fenwick, Johannes K. Sprafke, Jonathan Binas, Dmitry V. Kondratuk, Francesco Di Stasio, Harry L. Anderson, and Franco Cacialli, New York (2011)

Here we report organic light-emitting diodes incorporating linear and cyclic porphyrin hexamers which have red-shifted emission (λPL = 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 0 -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.

Partners : UCL

Place of Publication : New York

Date of Publication : 2011/05/18

Additional Data : Nano Lett. 2011, 11, 2451–2456

Link to the online version of the article.