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Nanomorphology of Bulk Heterojunction Organic Solar Cells in 2D and 3D Correlated to Photovoltaic Performance

Sophie Barrau ; Viktor Andersson ; Fengling Zhang ; Sergej Masich ; Johan Bijleveld (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Mats R. Andersson (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Olle Inganäs
Macromolecules (0024-9297). Vol. 42 (2009), 13, p. 4646-4650.
[Artikel, refereegranskad vetenskaplig]

Control of the nanoscale morphology of the donor−acceptor material blends in organic solar cells is critical for optimizing the photovoltaic performances. The influence of intrinsic (acceptor materials) and extrinsic (donor:acceptor weight ratio, substrate, solvent) parameters was investigated, by atomic force microscopy (AFM) and electron tomography (ET), on the nanoscale phase separation of blends of a low-band-gap alternating polyfluorene copolymers (APFO-Green9) with [6,6]-phenyl-C71-butyric acid methyl ester ([70]PCBM). The photovoltaic performances display an optimal efficiency for the device elaborated with a 1:3 APFO-Green polymer:[70]PCBM weight ratio and spin-coated from chloroform solution. The associated active layer morphology presents small phase-separated domains which is a good balance between a large interfacial donor−acceptor area and continuous paths of the donor and acceptor phases to the electrodes.



Denna post skapades 2010-01-15. Senast ändrad 2011-04-04.
CPL Pubid: 107984

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)

Ämnesområden

Polymerkemi

Chalmers infrastruktur