Efficient Förster energy transfer from phosphorescent organic molecules to J-aggregate thin films

Publication Type:

Journal Article

Source:

Chem. Phys. Lett., Elsevier, Volume 485, Issue 1–3, p.243-246 (2010)

ISBN:

0009-2614

Keywords:

2010, 2013 and earlier

Abstract:

We demonstrate efficient Förster resonance energy transfer (FRET) from a thin film of phosphorescent dye, fac tris(2-phenylpyridine) iridium
(Ir(ppy)3), to a thin film of J-aggregated cyanine dye,
5,6-dichloro-2-[3-[5,6-dichloro-1-ethyl-3-(3-sulfopropyl)-2(3H)-benzimidazolidene]-1-propenyl]-1-ethyl-3-(3-sulfopropyl)
benzimidazolium hydroxide (TDBC). The measurement is performed on a planar
sandwich structure with the layer of Ir(ppy)3 and the layer of
J-aggregates separated by a uniform optically inert spacer layer.
Quenching of Ir(ppy)3 photoluminescence due to FRET of Ir(ppy)3 excitons
to J-aggregates enables us to calculate the experimentally-determined
Förster radius of 3.8 nm, which is in good agreement with the
theoretically calculated value.