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