Perovskite Solar Cells with Carbon-Based Electrodes - Quantification of Losses and Strategies to Overcome Them
| العنوان: | Perovskite Solar Cells with Carbon-Based Electrodes - Quantification of Losses and Strategies to Overcome Them |
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| المؤلفون: | Bogachuk, Dmitry, Yang, Bowen, Suo, Jiajia, Martineau, David, Verma, Anand, Narbey, Stephanie, Anaya, Miguel, Frohna, Kyle, Doherty, Tiarnan, Mueller, David, Herterich, Jan P., Zouhair, Salma, Hagfeldt, Anders, Stranks, Samuel D., Wuerfel, Uli, Hinsch, Andreas, Wagner, Lukas |
| المصدر: | Advanced Energy Materials. 12(10) |
| مصطلحات موضوعية: | carbon-based electrodes, HTL-free, perovskites, photovoltaics, recombination |
| الوصف: | Carbon-based electrodes represent a promising approach to improve stability and up-scalability of perovskite photovoltaics. The temperature at which these contacts are processed defines the absorber grain size of the perovskite solar cell: in cells with low-temperature carbon-based electrodes (L-CPSCs), layer-by-layer deposition is possible, allowing perovskite crystals to be large (>100 nm), while in cells with high-temperature carbon-based contacts (H-CPSCs), crystals are constrained to 10-20 nm in size. To enhance the power conversion efficiency of these devices, the main loss mechanisms are identified for both systems. Measurements of charge carrier lifetime, quasi-Fermi level splitting (QFLS) and light-intensity-dependent behavior, supported by numerical simulations, clearly demonstrate that H-CPSCs strongly suffer from non-radiative losses in the perovskite absorber, primarily due to numerous grain boundaries. In contrast, large crystals of L-CPSCs provide a long carrier lifetime (1.8 mu s) and exceptionally high QFLS of 1.21 eV for an absorber bandgap of 1.6 eV. These favorable characteristics explain the remarkable open-circuit voltage of over 1.1 V in hole-selective layer-free L-CPSCs. However, the low photon absorption and poor charge transport in these cells limit their potential. Finally, effective strategies are provided to reduce non-radiative losses in H-CPSCs, transport losses in L-CPSCs, and to improve photon management in both cell types. |
| وصف الملف: | electronic |
| URL الوصول: | https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-485452 https://doi.org/10.1002/aenm.202103128 https://uu.diva-portal.org/smash/get/diva2:1700593/FULLTEXT01.pdf |
| قاعدة البيانات: | SwePub |
| DOI: | 10.1002/aenm.202103128 |
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