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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.20496 |
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| _version_ | 1866910061890109440 |
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| author | Intal, Donald Huneycutt, Sandra Ebong, Abasifreke Rohatgi, Ajeet Upadhyaya, Vijay Dasgupta, Sagnik Zhong, Ruohan Druffel, Thad Dharmadasa, Ruvini |
| author_facet | Intal, Donald Huneycutt, Sandra Ebong, Abasifreke Rohatgi, Ajeet Upadhyaya, Vijay Dasgupta, Sagnik Zhong, Ruohan Druffel, Thad Dharmadasa, Ruvini |
| contents | The formation of stable copper-silicide (Cu3Si) interfaces is crucial for cost-effective, high-efficiency solar cells. However, copper's diffusivity and electromigration issues pose challenges for contact stability. This study employs Laser-Enhanced Contact Optimization (LECO) to induce localized nano-scale Joule heating at the Cu-Si interface in phosphorus-doped p-PERC solar cells. High-resolution STEM and bright field analyses confirm stable Cu3Si formation in LECO-treated samples, with significantly reduced material segregation compared to nonLECO samples. SEM and post-etch EDS mapping demonstrate improved chemical resistance and interface cleanliness. Electrically, LECO treatmenet reduces series resistance by a factor 3, enhancing fill factor and efficiency while preserving diode quality. These results highlight LECO as a scalable method for reliable, silver-free solar cell metallization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_20496 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Critical look at the atmospheric Cu fire-through dielectric metallization for cost-effective and high efficiency silicon solar cells Intal, Donald Huneycutt, Sandra Ebong, Abasifreke Rohatgi, Ajeet Upadhyaya, Vijay Dasgupta, Sagnik Zhong, Ruohan Druffel, Thad Dharmadasa, Ruvini Applied Physics Materials Science The formation of stable copper-silicide (Cu3Si) interfaces is crucial for cost-effective, high-efficiency solar cells. However, copper's diffusivity and electromigration issues pose challenges for contact stability. This study employs Laser-Enhanced Contact Optimization (LECO) to induce localized nano-scale Joule heating at the Cu-Si interface in phosphorus-doped p-PERC solar cells. High-resolution STEM and bright field analyses confirm stable Cu3Si formation in LECO-treated samples, with significantly reduced material segregation compared to nonLECO samples. SEM and post-etch EDS mapping demonstrate improved chemical resistance and interface cleanliness. Electrically, LECO treatmenet reduces series resistance by a factor 3, enhancing fill factor and efficiency while preserving diode quality. These results highlight LECO as a scalable method for reliable, silver-free solar cell metallization. |
| title | Critical look at the atmospheric Cu fire-through dielectric metallization for cost-effective and high efficiency silicon solar cells |
| topic | Applied Physics Materials Science |
| url | https://arxiv.org/abs/2603.20496 |