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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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