Understanding Performance Limiting Interfacial Recombination in pin Perovskite Solar Cells
| Autor: | Jonathan Warby, Fengshuo Zu, Stefan Zeiske, Emilio Gutierrez‐Partida, Lennart Frohloff, Simon Kahmann, Kyle Frohna, Edoardo Mosconi, Eros Radicchi, Felix Lang, Sahil Shah, Francisco Peña‐Camargo, Hannes Hempel, Thomas Unold, Norbert Koch, Ardalan Armin, Filippo De Angelis, Samuel D. Stranks, Dieter Neher, Martin Stolterfoht |
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| Přispěvatelé: | Warby, J [0000-0003-3518-173X], Zu, F [0000-0002-5861-4887], Stolterfoht, M [0000-0002-4023-2178], Apollo - University of Cambridge Repository |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Advanced Energy Materials |
| Popis: | Funder: Alexander von Humboldt Foundation; Id: http://dx.doi.org/10.13039/100005156 Perovskite semiconductors are an attractive option to overcome the limitations of established silicon based photovoltaic (PV) technologies due to their exceptional opto‐electronic properties and their successful integration into multijunction cells. However, the performance of single‐ and multijunction cells is largely limited by significant nonradiative recombination at the perovskite/organic electron transport layer junctions. In this work, the cause of interfacial recombination at the perovskite/C60 interface is revealed via a combination of photoluminescence, photoelectron spectroscopy, and first‐principle numerical simulations. It is found that the most significant contribution to the total C60‐induced recombination loss occurs within the first monolayer of C60, rather than in the bulk of C60 or at the perovskite surface. The experiments show that the C60 molecules act as deep trap states when in direct contact with the perovskite. It is further demonstrated that by reducing the surface coverage of C60, the radiative efficiency of the bare perovskite layer can be retained. The findings of this work pave the way toward overcoming one of the most critical remaining performance losses in perovskite solar cells. |
| Databáze: | OpenAIRE |
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