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Title: White Electroluminescence by Supramolecular Control of Energy Transfer in Blends of Organic-Soluble Encapsulated Polyfluorenes
Authors: Brovelli, Sergio
Meinardi, Francesco
Winroth, Gustaf
Fenwick, Oliver
Sforazzini, Giuseppe
Frampton, Michael J
Zalewski, Leszek
Levitt, James A
Marinello, Francesco
Schiavuta, Piero
Suhling, Klaus
Anderson, Harry L
Cacialli, Franco # ×
Issue Date: Jan-2010
Publisher: Wiley-v c h verlag gmbh
Series Title: Advanced functional materials vol:20 issue:2 pages:272-280
Abstract: Here, it is demonstrated that energy transfer in a blend of semiconducting polymers can be strongly reduced by non-covalent encapsulation of one constituent, ensured by threading of the conjugated strands into functionalized cyclodextrins. Such macrocycles control the minimum intermolecular distance of chromophores with similar alignment, at the nanoscale, and therefore the relevant energy transfer rates, thus enabling fabrication of white-light-emitting diodes (CIE coordinates: x = 0.282, gamma = 0.336). In particular, white electroluminescence in a binary blend of a blue-emitting, organic-soluble rotaxane based on a polyfluorene derivative and the green-emitting poly(9,9-dioctylfluorene-alt-benzothiadiazole (F8BT) is achieved. Morphological and structural analyses by atomic force microscopy, fluorescence mapping, mu-Raman, and fluorescence lifetime microscopy are used to complement optical and electroluminescence characterization, and to enable a deeper insight into the properties of the novel blend.
ISSN: 1616-301X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Associated Section of ESAT - INSYS, Integrated Systems
× corresponding author
# (joint) last author

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