Electroabsorption studies of organic bulk-heterojunction solar cells
The working principle of organic bulk-heterojunction solar cells is a widely discussed topic. For thin film solar cells it is commonly supposed that the built-in potential V<sub>bi</sub> is the driving force for charge separation and determines the open-circuit voltage V<sub>oc<...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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Elsevier
2005
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| _version_ | 1826264305696243712 |
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| author | Zimmermann, B Glatthaar, M Niggemann, M Riede, M Hinsch, A |
| author_facet | Zimmermann, B Glatthaar, M Niggemann, M Riede, M Hinsch, A |
| author_sort | Zimmermann, B |
| collection | OXFORD |
| description | The working principle of organic bulk-heterojunction solar cells is a widely discussed topic. For thin film solar cells it is commonly supposed that the built-in potential V<sub>bi</sub> is the driving force for charge separation and determines the open-circuit voltage V<sub>oc</sub>. In former works, V<sub>bi</sub> was estimated by measuring V<sub>oc</sub> in the saturation regime. To check the validity of this model, the direct measurement of the built-in potential is desirable. We have investigated the origin of the open-circuit voltage of organic bulk-heterojunction solar cells by means of electroabsorption spectroscopy. This technique allows measurement of the built-in potential directly and therefore permits an independent measurement of V<sub>bi</sub> and V<sub>oc</sub>. In our experiments on indium tin oxide/poly(3,4-ethylendioxythiophene) : poly(styrene-sulfonate)/poly(2 -methoxy-5-(3′,7′-dimethyloktyloxy)-p-phenylene-vinylene) : 1-(3-methoxycarbonyl)-propyl-1-1-phenyl-(6,6)C<sub>61</sub>/metal bulk-heterojunction solar cells no significant correlation between the open-circuit voltage and the built-in potential was observed. For certain electrode materials, i.e. gold and copper, V<sub>oc</sub> exceeded V<sub>bi</sub> which is revealing of semipermeable membranes. © 2005 Elsevier B.V. All rights reserved. |
| first_indexed | 2024-03-06T20:05:39Z |
| format | Journal article |
| id | oxford-uuid:28d0b737-8d73-41b8-825c-5f250bee7b5a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:05:39Z |
| publishDate | 2005 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:28d0b737-8d73-41b8-825c-5f250bee7b5a2022-03-26T12:15:17ZElectroabsorption studies of organic bulk-heterojunction solar cellsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:28d0b737-8d73-41b8-825c-5f250bee7b5aEnglishSymplectic Elements at OxfordElsevier2005Zimmermann, BGlatthaar, MNiggemann, MRiede, MHinsch, AThe working principle of organic bulk-heterojunction solar cells is a widely discussed topic. For thin film solar cells it is commonly supposed that the built-in potential V<sub>bi</sub> is the driving force for charge separation and determines the open-circuit voltage V<sub>oc</sub>. In former works, V<sub>bi</sub> was estimated by measuring V<sub>oc</sub> in the saturation regime. To check the validity of this model, the direct measurement of the built-in potential is desirable. We have investigated the origin of the open-circuit voltage of organic bulk-heterojunction solar cells by means of electroabsorption spectroscopy. This technique allows measurement of the built-in potential directly and therefore permits an independent measurement of V<sub>bi</sub> and V<sub>oc</sub>. In our experiments on indium tin oxide/poly(3,4-ethylendioxythiophene) : poly(styrene-sulfonate)/poly(2 -methoxy-5-(3′,7′-dimethyloktyloxy)-p-phenylene-vinylene) : 1-(3-methoxycarbonyl)-propyl-1-1-phenyl-(6,6)C<sub>61</sub>/metal bulk-heterojunction solar cells no significant correlation between the open-circuit voltage and the built-in potential was observed. For certain electrode materials, i.e. gold and copper, V<sub>oc</sub> exceeded V<sub>bi</sub> which is revealing of semipermeable membranes. © 2005 Elsevier B.V. All rights reserved. |
| spellingShingle | Zimmermann, B Glatthaar, M Niggemann, M Riede, M Hinsch, A Electroabsorption studies of organic bulk-heterojunction solar cells |
| title | Electroabsorption studies of organic bulk-heterojunction solar cells |
| title_full | Electroabsorption studies of organic bulk-heterojunction solar cells |
| title_fullStr | Electroabsorption studies of organic bulk-heterojunction solar cells |
| title_full_unstemmed | Electroabsorption studies of organic bulk-heterojunction solar cells |
| title_short | Electroabsorption studies of organic bulk-heterojunction solar cells |
| title_sort | electroabsorption studies of organic bulk heterojunction solar cells |
| work_keys_str_mv | AT zimmermannb electroabsorptionstudiesoforganicbulkheterojunctionsolarcells AT glatthaarm electroabsorptionstudiesoforganicbulkheterojunctionsolarcells AT niggemannm electroabsorptionstudiesoforganicbulkheterojunctionsolarcells AT riedem electroabsorptionstudiesoforganicbulkheterojunctionsolarcells AT hinscha electroabsorptionstudiesoforganicbulkheterojunctionsolarcells |