Academic Journal
Paste-based Silver Reduction for iTOPCon Rear Side Metallization
| العنوان: | Paste-based Silver Reduction for iTOPCon Rear Side Metallization |
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| المؤلفون: | Ourinson, Daniel, Brand, Andreas, Lorenz, Andreas, Dhamrin, Marwan, Tepner, Sebastian, Linse, Michael, Göttlicher, Nathalie, Haberstroh, René, Tsuji, Kosuke, Huyeng, Jonas, Clement, Florian |
| سنة النشر: | 2024 |
| المجموعة: | Publikationsdatenbank der Fraunhofer-Gesellschaft |
| مصطلحات موضوعية: | Silver reduction, TOPCon, Aluminum, Copper, Solar cell |
| الوصف: | This work presents two approaches to reduce the silver (Ag) amount on the rear side of M2-sized industrial tunnel oxide passivated contact (iTOPCon) solar cells by (partially) substituting conventional Ag pastes with copper (Cu) and aluminum (Al) pastes. The first approach is Cu-based and works by screen printing an Ag layer with ca. 75% Ag paste reduction compared to a conventional Ag layer (functioning as a contact and Cu barrier layer) and screen printing a full-area Cu layer on top of the Ag layer (functioning as a conduction layer compensating the reduced Ag amount). This Cu-based approach yields similar power conversion efficiency (η) compared to the conventional approach, showing the Cu-based approach is promising for iTOPCon solar cells. The second approach is Al-based and works by laser contact opening of the dielectric layers and screen printing a full-area layer with an Al paste - adapted to properly contact an n+-poly-Si layer -, substituting Ag on the rear side entirely. This Al-based approach exhibits a 0.9%abs η gap to the conventional approach, mainly stemming from the Al paste damaging the poly-Si layer, while - on a positive note - neither rear p+ layer formation nor tunnel oxide layer penetration by the Al paste is detected. Even though the abovementioned η gap must be eliminated in the future, it shows the principal functionality and potential of such type of contact for iTOPCon solar cells. ; 266 |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0927-0248 |
| Relation: | Solar energy materials and solar cells; https://publica.fraunhofer.de/handle/publica/464526; https://doi.org/10.24406/publica-2850 |
| DOI: | 10.1016/j.solmat.2023.112646 |
| DOI: | 10.24406/publica-2850 |
| الاتاحة: | https://publica.fraunhofer.de/handle/publica/464526 https://doi.org/10.1016/j.solmat.2023.112646 https://doi.org/10.24406/publica-2850 |
| Rights: | CC BY 4.0 |
| رقم الانضمام: | edsbas.209175C9 |
| قاعدة البيانات: | BASE |
| تدمد: | 09270248 |
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| DOI: | 10.1016/j.solmat.2023.112646 |