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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/1586

Title: Observation of the subgap optical absorption in polymer-fullerene blend solar cells
Authors: GORIS, Ludwig
Poruba, A.
Hod'akova, L.
Vanecek, M.
HAENEN, Ken
NESLADEK, Milos
WAGNER, Patrick
VANDERZANDE, Dirk
DE SCHEPPER, Luc
MANCA, Jean
Issue Date: 2006
Publisher: American Institute of Physics
Citation: APPLIED PHYSICS LETTERS, 88(5). p. 052113-...
Abstract: This letter reports on highly sensitive optical absorption measurements on organic donor-acceptor solar cells, using Fourier-transform photocurrent spectroscopy (FTPS). The spectra cover an unprecedented dynamic range of eight to nine orders of magnitude making it possible to detect defect and disorder related sub-band gap transitions. Direct measurements on fully encapsulated solar cells with an active layer of poly[2-methoxy-5-(3[prime],7[prime]-dimethyl-octyloxy)]-p-phenylene-vinylene:(6,6)-phenyl-C61-butyric-acid (1:4 weight ratio) enabled a study of the intrinsic defect generation due to UV illumination. Solar cell temperature annealing effects in poly(3-hexylthiophene):PCBM (1:2 weight ratio) cells and the induced morphological changes are related to the changes in the absorption spectrum, as determined with FTPS.
URI: http://hdl.handle.net/1942/1586
DOI: 10.1063/1.2171492
ISI #: 000235136700052
ISSN: 0003-6951
Category: A1
Type: Journal Contribution
Validation: ecoom, 2007
Appears in Collections: Research publications

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