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| Autores principales: | , , |
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| Formato: | Recurso digital |
| Lenguaje: | |
| Publicado: |
Zenodo
2026
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| Acceso en línea: | https://doi.org/10.5281/zenodo.19565665 |
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- <p>The EU Horizon Resilex project aims to improve the resilience and sustainability of the silicon value chain in Europe. A sustainable method for silicon production and recycling of silicon from the solar industry are among the project’s focus areas.<br>Here the first steps of the silicon value chain with the demonstration of a sustainable carbon-free process for the production of silicon compatible with solar applications are considered. From the purified silicon produced by NTNU, CEA assessed the suitability of alternative feedstock for the production of solar cells for two types of recycled silicon: one after additional directional crystallization and the other after Czochralski growth process.<br>With the additional directional crystallization, the recycled silicon reached a level of purity between 2N to 4N. According to these results CEA pulled one Cz ingot that simulates a blending condition (1.8% of recycled silicon with 98.2% of EG silicon) while retaining only the boron and phosphorus concentrations of the recycled silicon. From this Cz ingot, 700 M2 size wafers were prepared for cell processing.<br>With the additional Czochralski growth process, the recycled silicon reached a level of purity of 3N to 5N. According to these results, CEA will attempt, in the first quarter of 2025, to manufacture a Cz ingot from this recycled silicon under the following conditions: 10% recycled silicon after additional Czochralski growth process and 90% EG silicon.<br>This study is part of the EU Horizon Resilex project, which aims to increase the circularity in the PV industry. The project has received funding from the European Union’s HORIZON Action Grant program under Grant Agreement N° 101058583.</p>