Photoconductivity as loss mechanism in organic solar cells
We observe that the reverse current under illumination in solar cells containing C<sub>60</sub> and ZnPc is dominated by a photoshunt. This shunt, not present in the dark, causes a linear current-voltage relation under illumination showing no saturation. Although observable in bulk heter...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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Wiley
2013
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| _version_ | 1826269896319696896 |
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| author | Tress, W Leo, K Riede, M |
| author_facet | Tress, W Leo, K Riede, M |
| author_sort | Tress, W |
| collection | OXFORD |
| description | We observe that the reverse current under illumination in solar cells containing C<sub>60</sub> and ZnPc is dominated by a photoshunt. This shunt, not present in the dark, causes a linear current-voltage relation under illumination showing no saturation. Although observable in bulk heterojunctions, this effect is more pronounced in the presence of a pristine C<sub>60</sub> layer. An internal quantum efficiency larger than unity under an applied negative voltage and in the spectral range where C<sub>60</sub> absorbs identifies charges which are injected in addition to those photogenerated. The photoshunt is also present in the power-generating region and represents a loss mechanism limiting the fill factor in particular for flat heterojunction devices. © 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim. |
| first_indexed | 2024-03-06T21:32:21Z |
| format | Journal article |
| id | oxford-uuid:4516d062-ed5c-4e5e-9caf-b53f7702f587 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:32:21Z |
| publishDate | 2013 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:4516d062-ed5c-4e5e-9caf-b53f7702f5872022-03-26T15:05:47ZPhotoconductivity as loss mechanism in organic solar cellsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4516d062-ed5c-4e5e-9caf-b53f7702f587EnglishSymplectic Elements at OxfordWiley2013Tress, WLeo, KRiede, MWe observe that the reverse current under illumination in solar cells containing C<sub>60</sub> and ZnPc is dominated by a photoshunt. This shunt, not present in the dark, causes a linear current-voltage relation under illumination showing no saturation. Although observable in bulk heterojunctions, this effect is more pronounced in the presence of a pristine C<sub>60</sub> layer. An internal quantum efficiency larger than unity under an applied negative voltage and in the spectral range where C<sub>60</sub> absorbs identifies charges which are injected in addition to those photogenerated. The photoshunt is also present in the power-generating region and represents a loss mechanism limiting the fill factor in particular for flat heterojunction devices. © 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim. |
| spellingShingle | Tress, W Leo, K Riede, M Photoconductivity as loss mechanism in organic solar cells |
| title | Photoconductivity as loss mechanism in organic solar cells |
| title_full | Photoconductivity as loss mechanism in organic solar cells |
| title_fullStr | Photoconductivity as loss mechanism in organic solar cells |
| title_full_unstemmed | Photoconductivity as loss mechanism in organic solar cells |
| title_short | Photoconductivity as loss mechanism in organic solar cells |
| title_sort | photoconductivity as loss mechanism in organic solar cells |
| work_keys_str_mv | AT tressw photoconductivityaslossmechanisminorganicsolarcells AT leok photoconductivityaslossmechanisminorganicsolarcells AT riedem photoconductivityaslossmechanisminorganicsolarcells |