Understanding S-shaped current-voltage characteristics of organic solar cells: direct measurement of potential distributions by scanning Kelvin probe
We present a comparison of the potential distribution along the cross section of bilayer poly(3-hexylthiophene)/1-(3-methoxycarbonyl)propyl-1-phenyl[6,6]C61 (P3HT/PCBM) solar cells, which show normal and anomalous, S-shaped current-voltage (IV) characteristics. We expose the cross sections of the de...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
11 December 2013
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| In: |
Applied physics letters
Year: 2013, Volume: 103, Issue: 24, Pages: 1-3 |
| ISSN: | 1077-3118 |
| DOI: | 10.1063/1.4846615 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1063/1.4846615 Verlag, lizenzpflichtig, Volltext: https://aip.scitation.org/doi/10.1063/1.4846615 
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| Author Notes: | Rebecca Saive, Christian Mueller, Janusz Schinke, Robert Lovrincic, and Wolfgang Kowalsky |
| Summary: | We present a comparison of the potential distribution along the cross section of bilayer poly(3-hexylthiophene)/1-(3-methoxycarbonyl)propyl-1-phenyl[6,6]C61 (P3HT/PCBM) solar cells, which show normal and anomalous, S-shaped current-voltage (IV) characteristics. We expose the cross sections of the devices with a focussed ion beam and measure them with scanning Kelvin probe microscopy. We find that in the case of S-shaped IV-characteristics, there is a huge potential drop at the PCBM/Al top contact, which does not occur in solar cells with normal IV-characteristics. This behavior confirms the assumption that S-shaped curves are caused by hindered charge transport at interfaces. |
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| Item Description: | Gesehen am 26.01.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1077-3118 |
| DOI: | 10.1063/1.4846615 |