Reduction of Scarce Materials in Silicon Heterojunction Solar Cells and Implications on the Performance in the Field
In the first part of this work the potential to save silver for n-type silicon heterojunction solar cells was investigated. Cells were produced with varied frontside screen opening (30-50 µm). The groups were compared for efficiency at different irradiation levels and frontside silver laydown. For...
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TIB Open Publishing
2025-02-01
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| Series: | SiliconPV Conference Proceedings |
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| Online Access: | https://www.tib-op.org/ojs/index.php/siliconpv/article/view/839 |
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| author | Sebastian Pingel Ioan Voicu Vulcanean Timo Wenzel Winfried Wolke Vasileios Georgiou-Sarlikiotis Philipp Schmid Henning Nagel Ulli Kräling Martin Bivour Anamaria Steinmetz |
| author_facet | Sebastian Pingel Ioan Voicu Vulcanean Timo Wenzel Winfried Wolke Vasileios Georgiou-Sarlikiotis Philipp Schmid Henning Nagel Ulli Kräling Martin Bivour Anamaria Steinmetz |
| author_sort | Sebastian Pingel |
| collection | DOAJ |
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In the first part of this work the potential to save silver for n-type silicon heterojunction solar cells was investigated. Cells were produced with varied frontside screen opening (30-50 µm). The groups were compared for efficiency at different irradiation levels and frontside silver laydown. For five busbar configuration large opening with low series resistance led to the highest efficiency for high irradiation around 1000 W/m² while for low irradiations all cells performed similarly. For busbarless cells lower silver laydown led to similar efficiency with slight advances for narrow screen opening. In summary cell technologies with small busbar-pitch are more tolerant for low-silver metallization. In the second part the impact of the transparent conductive oxide (TCO) was addressed. Silicon Heterojunction cells were produced with either ITO (indium tin oxide) only or an ITO-AZO-ITO (aluminium doped zinc oxide) stack, enabling an ITO reduction of about 50%, leading to a tolerable efficiency-drop of 0.3%. These internal samples were compared to industrial heterojunction-precursors (post ITO) with reference and low silver consumption frontside metallization. For both parts IV measurement showed that series resistance has a strong impact on efficiency but a rather small impact on low light-efficiency. Considering low light conditions TCO-precursor type with differences in passivation have a strong impact. On module level similar irradiation dependence of the efficiency was found and in temperature-dependent IV-measurements a positive impact of high-quality passivation on the temperature coefficients was found while an increase of the series resistance had a negative impact on the temperature dependence.
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| format | Article |
| id | doaj-art-45fcd09875904edab88ab7947fd0e79c |
| institution | Kabale University |
| issn | 2940-2123 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | TIB Open Publishing |
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| series | SiliconPV Conference Proceedings |
| spelling | doaj-art-45fcd09875904edab88ab7947fd0e79c2025-02-04T09:54:13ZengTIB Open PublishingSiliconPV Conference Proceedings2940-21232025-02-01210.52825/siliconpv.v2i.839Reduction of Scarce Materials in Silicon Heterojunction Solar Cells and Implications on the Performance in the FieldSebastian Pingel0https://orcid.org/0000-0001-9552-8761Ioan Voicu Vulcanean1Timo Wenzel2Winfried Wolke3Vasileios Georgiou-Sarlikiotis4Philipp Schmid5Henning Nagel6https://orcid.org/0000-0003-4315-7561Ulli Kräling7Martin Bivour8Anamaria Steinmetz9Fraunhofer Institute for Solar Energy Systems Fraunhofer Institute for Solar Energy SystemsFraunhofer Institute for Solar Energy Systems Fraunhofer Institute for Solar Energy Systems Fraunhofer Institute for Solar Energy Systems RENA Technologies (Germany) Fraunhofer Institute for Solar Energy SystemsFraunhofer Institute for Solar Energy Systems Fraunhofer Institute for Solar Energy Systems Fraunhofer Institute for Solar Energy Systems In the first part of this work the potential to save silver for n-type silicon heterojunction solar cells was investigated. Cells were produced with varied frontside screen opening (30-50 µm). The groups were compared for efficiency at different irradiation levels and frontside silver laydown. For five busbar configuration large opening with low series resistance led to the highest efficiency for high irradiation around 1000 W/m² while for low irradiations all cells performed similarly. For busbarless cells lower silver laydown led to similar efficiency with slight advances for narrow screen opening. In summary cell technologies with small busbar-pitch are more tolerant for low-silver metallization. In the second part the impact of the transparent conductive oxide (TCO) was addressed. Silicon Heterojunction cells were produced with either ITO (indium tin oxide) only or an ITO-AZO-ITO (aluminium doped zinc oxide) stack, enabling an ITO reduction of about 50%, leading to a tolerable efficiency-drop of 0.3%. These internal samples were compared to industrial heterojunction-precursors (post ITO) with reference and low silver consumption frontside metallization. For both parts IV measurement showed that series resistance has a strong impact on efficiency but a rather small impact on low light-efficiency. Considering low light conditions TCO-precursor type with differences in passivation have a strong impact. On module level similar irradiation dependence of the efficiency was found and in temperature-dependent IV-measurements a positive impact of high-quality passivation on the temperature coefficients was found while an increase of the series resistance had a negative impact on the temperature dependence. https://www.tib-op.org/ojs/index.php/siliconpv/article/view/839HeterojunctionField PerformanceSilver ConsumptionIndium Consumption |
| spellingShingle | Sebastian Pingel Ioan Voicu Vulcanean Timo Wenzel Winfried Wolke Vasileios Georgiou-Sarlikiotis Philipp Schmid Henning Nagel Ulli Kräling Martin Bivour Anamaria Steinmetz Reduction of Scarce Materials in Silicon Heterojunction Solar Cells and Implications on the Performance in the Field SiliconPV Conference Proceedings Heterojunction Field Performance Silver Consumption Indium Consumption |
| title | Reduction of Scarce Materials in Silicon Heterojunction Solar Cells and Implications on the Performance in the Field |
| title_full | Reduction of Scarce Materials in Silicon Heterojunction Solar Cells and Implications on the Performance in the Field |
| title_fullStr | Reduction of Scarce Materials in Silicon Heterojunction Solar Cells and Implications on the Performance in the Field |
| title_full_unstemmed | Reduction of Scarce Materials in Silicon Heterojunction Solar Cells and Implications on the Performance in the Field |
| title_short | Reduction of Scarce Materials in Silicon Heterojunction Solar Cells and Implications on the Performance in the Field |
| title_sort | reduction of scarce materials in silicon heterojunction solar cells and implications on the performance in the field |
| topic | Heterojunction Field Performance Silver Consumption Indium Consumption |
| url | https://www.tib-op.org/ojs/index.php/siliconpv/article/view/839 |
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