Field and temperature dependence of the photocurrent in polymer/fullerene bulk heterojunction solar cells
The photocurrent in polymer/fullerene blends is characterized as a function of bias at temperatures ranging from 125to300K125to300K<math display="inline" overflow="scroll" altimg="eq-00001.gif"><mrow><mn>125</mn><mspace width="0.3em"...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
14 September 2005
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| In: |
Applied physics letters
Year: 2005, Volume: 87, Issue: 12 |
| ISSN: | 1077-3118 |
| DOI: | 10.1063/1.2056609 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1063/1.2056609 Verlag, Volltext: https://aip.scitation.org/doi/10.1063/1.2056609 
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| Author Notes: | H.H.P. Gommans, M. Kemerink, J.M. Kramer, and R.A.J. Janssen |
| Summary: | The photocurrent in polymer/fullerene blends is characterized as a function of bias at temperatures ranging from 125to300K125to300K<math display="inline" overflow="scroll" altimg="eq-00001.gif"><mrow><mn>125</mn><mspace width="0.3em"></mspace><mtext>to</mtext><mspace width="0.3em"></mspace><mn>300</mn><mspace width="0.3em"></mspace><mi mathvariant="normal">K</mi></mrow></math>. Assuming a constant generation rate and bimolecular recombination, the results are numerically modeled within the drift-diffusion approximation. Bimolecular recombination is found to be a dominant factor in the field dependence of the photocurrent in the entire measured voltage range. Inclusion of field dependent geminate pair dissociation and recombination via the Onsager expressions gives a much stronger field dependence than experimentally observed. From the temperature dependence of the extracted mobilities, we can simultaneously estimate the broadening of the transporting highest occupied and lowest unoccupied molecular orbital levels. |
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| Item Description: | Gesehen am 11.12.2019 |
| Physical Description: | Online Resource |
| ISSN: | 1077-3118 |
| DOI: | 10.1063/1.2056609 |