Design rules for high-efficiency both-sides-contacted silicon solar cells with balanced charge carrier transport and recombination losses
| Autor: | Christian Reichel, Martin Bivour, Armin Richter, Bernd Steinhauser, Ralph Müller, Frank Feldmann, Stefan W. Glunz, Martin Hermle, Jan Benick, Andreas Fell |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Silicon Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Electron engineering.material 010402 general chemistry 01 natural sciences Photovoltaics Crystalline silicon Renewable Energy Sustainability and the Environment business.industry Energy conversion efficiency Front (oceanography) 021001 nanoscience & nanotechnology 0104 chemical sciences Electronic Optical and Magnetic Materials Fuel Technology Polycrystalline silicon chemistry engineering Optoelectronics Charge carrier 0210 nano-technology business |
| Zdroj: | Nature Energy. 6:429-438 |
| ISSN: | 2058-7546 |
| Popis: | The photovoltaic industry is dominated by crystalline silicon solar cells. Although interdigitated back-contact cells have yielded the highest efficiency, both-sides-contacted cells are the preferred choice in industrial production due to their lower complexity. Here we show that omitting the layers at the front side that provide lateral charge carrier transport is the key to excellent optoelectrical properties for both-sides-contacted cells. This results in a conversion efficiency of 26.0%. In contrast to standard industrial cells with a front side p–n junction, this cell exhibits the p–n junction at the back surface in the form of a full-area polycrystalline silicon-based passivating contact. A detailed power-loss analysis reveals that this cell balances electron and hole transport losses as well as transport and recombination losses in general. A systematic simulation study led to some fundamental design rules for future >26% efficiency silicon solar cells and demonstrates the potential and the superiority of these back-junction solar cells. Front- and back-junction silicon photovoltaics dominate the market thanks to a lower manufacturing complexity compared with that of other device designs yet advances in efficiency remain elusive. Richter et al. now present an optimized design for the front and back junctions that leads to a 26.0%-efficient cell. |
| Databáze: | OpenAIRE |
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