Thin-film polycrystalline silicon solar cells on ceramic substrates with a Voc above 500 mV
| Autor: | G. Agostinelli, D. Van Gestel, K. Van Nieuwenhuysen, Jef Poortmans, Ivan Gordon, Guy Beaucarne, L. Carnel |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
business.industry Metals and Alloys Heterojunction Surfaces and Interfaces Hybrid solar cell Quantum dot solar cell engineering.material Polymer solar cell Surfaces Coatings and Films Electronic Optical and Magnetic Materials Polycrystalline silicon Photovoltaics Materials Chemistry engineering Optoelectronics Homojunction business Common emitter |
| Zdroj: | Thin Solid Films. :21-25 |
| ISSN: | 0040-6090 |
| Popis: | Thin-film polycrystalline-silicon solar cells offer a promising alternative to standard silicon solar cells. Until now, however, obtained efficiencies are too low to lead to a cost reduction in photovoltaics. To obtain cells with higher efficiencies, polycrystalline-silicon layers need large grains, good passivation and an optimized cell design. In this work we compare pc-Si solar cells with an amorphous silicon–crystalline silicon heterojunction emitter to cells with a diffused phosphorus emitter. In heterojunction cells, hydrogen passivation was carried out before emitter formation, which appears to make it more effective. Open-circuit voltages ( V oc ) were much higher for cells with a heterojunction emitter, reaching values up to 520 mV. A maximum efficiency of 5.3% was obtained on the heterojunction cells, while the homojunction cells led to substantially lower efficiencies. A cell concept based on a heterojunction emitter seems therefore most favorable to lead to highly efficient thin-film pc-Si solar cells. The high V oc and efficiency values obtained in this work form an important step towards cost-effective polycrystalline-silicon solar cells. |
| Databáze: | OpenAIRE |
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