Observation of the subgap optical absorption in polymer-fullerene blend solar cells
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 disor...
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| Published in | Applied physics letters Vol. 88; no. 5; pp. 052113 - 052113-3 |
|---|---|
| Main Authors | , , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
American Institute of Physics
30.01.2006
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| Subjects | |
| Online Access | Get full text |
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| 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
′
,
7
′
-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. |
|---|---|
| AbstractList | 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{sup '},7{sup '}-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. 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 ′ , 7 ′ -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. 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′,7′-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. |
| Author | Goris, L. Haenen, K. De Schepper, L. Poruba, A. Hod'ákova, L. Vaněček, M. Manca, J. V. Vanderzande, D. Nesládek, M. Wagner, P. |
| Author_xml | – sequence: 1 givenname: L. surname: Goris fullname: Goris, L. organization: Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium – sequence: 2 givenname: A. surname: Poruba fullname: Poruba, A. organization: Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnicka 10, CZ-16200 Prague 6, Czech Republic – sequence: 3 givenname: L. surname: Hod'ákova fullname: Hod'ákova, L. organization: Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnicka 10, CZ-16200 Prague 6, Czech Republic – sequence: 4 givenname: M. surname: Vaněček fullname: Vaněček, M. organization: Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnicka 10, CZ-16200 Prague 6, Czech Republic – sequence: 5 givenname: K. surname: Haenen fullname: Haenen, K. email: Division IMOMEC, IMEC vzw, Wetenschapspark 1, B-3590 Diepenbeek, Belgium organization: Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium – sequence: 6 givenname: M. surname: Nesládek fullname: Nesládek, M. email: Division IMOMEC, IMEC vzw, Wetenschapspark 1, B-3590 Diepenbeek, Belgium organization: Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium – sequence: 7 givenname: P. surname: Wagner fullname: Wagner, P. organization: Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium – sequence: 8 givenname: D. surname: Vanderzande fullname: Vanderzande, D. email: Division IMOMEC, IMEC vzw, Wetenschapspark 1, B-3590 Diepenbeek, Belgium organization: Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium – sequence: 9 givenname: L. surname: De Schepper fullname: De Schepper, L. email: Division IMOMEC, IMEC vzw, Wetenschapspark 1, B-3590 Diepenbeek, Belgium organization: Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium – sequence: 10 givenname: J. surname: Manca middlename: V. fullname: Manca, J. V. email: Division IMOMEC, IMEC vzw, Wetenschapspark 1, B-3590 Diepenbeek, Belgium organization: Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium |
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| SubjectTerms | ABSORPTION ABSORPTION SPECTRA ANNEALING BUTYRIC ACID CRYSTAL DEFECTS FOURIER TRANSFORMATION FULLERENES ILLUMINANCE LAYERS MATERIALS SCIENCE MORPHOLOGICAL CHANGES PHOTOCONDUCTIVITY POLYMERS SOLAR CELLS SPECTROSCOPY ULTRAVIOLET RADIATION |
| Title | Observation of the subgap optical absorption in polymer-fullerene blend solar cells |
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