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
Source: 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.
Keywords: polymer blends; fullerenes; solar cells; Fourier transform spectra; photoconductivity; ultraviolet radiation effects; annealing
Document URI: http://hdl.handle.net/1942/1586
ISSN: 0003-6951
e-ISSN: 1077-3118
DOI: 10.1063/1.2171492
ISI #: 000235136700052
Category: A1
Type: Journal Contribution
Validations: ecoom 2007
Appears in Collections:Research publications

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