Probing Photocurrent Nonuniformities in the Subcells of Monolithic Perovskite/Silicon Tandem Solar Cells
| Autor: | Florent Sahli, Adam B. Phillips, Michael J. Heben, Christophe Ballif, Suneth C. Watthage, Björn Niesen, Jérémie Werner, Randy J. Ellingson, Zhaoning Song, Stefaan De Wolf, Niraj Shrestha |
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| Rok vydání: | 2016 |
| Předmět: |
Photocurrent
Materials science Silicon Tandem business.industry Photovoltaic system chemistry.chemical_element Biasing 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Laser 01 natural sciences 0104 chemical sciences law.invention Optics chemistry law Optoelectronics Light beam General Materials Science Physical and Theoretical Chemistry 0210 nano-technology business Perovskite (structure) |
| Zdroj: | The Journal of Physical Chemistry Letters. 7:5114-5120 |
| ISSN: | 1948-7185 |
| Popis: | Perovskite/silicon tandem solar cells with high power conversion efficiencies have the potential to become a commercially viable photovoltaic option in the near future. However, device design and optimization is challenging because conventional characterization methods do not give clear feedback on the localized chemical and physical factors that limit performance within individual subcells, especially when stability and degradation is a concern. In this study, we use light beam induced current (LBIC) to probe photocurrent collection nonuniformities in the individual subcells of perovskite/silicon tandems. The choices of lasers and light biasing conditions allow efficiency-limiting effects relating to processing defects, optical interference within the individual cells, and the evolution of water-induced device degradation to be spatially resolved. The results reveal several types of microscopic defects and demonstrate that eliminating these and managing the optical properties within the multilayer structures will be important for future optimization of perovskite/silicon tandem solar cells. |
| Databáze: | OpenAIRE |
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