Journal article
Optical analysis of CH3NH3Sn x Pb1-x I3 absorbers: a roadmap for perovskite-on-perovskite tandem solar cells.
- Anaya M Institute of Materials Science of Seville , Spanish National Research Council-University of Seville , Américo Vespucio 49 , 41092 , Seville , Spain . Email: h.miguez@csic.es.
- Correa-Baena JP Laboratory for Photomolecular Science , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , CH-1015-Lausanne , Switzerland . Email: juan.correa@epfl.ch.
- Lozano G Institute of Materials Science of Seville , Spanish National Research Council-University of Seville , Américo Vespucio 49 , 41092 , Seville , Spain . Email: h.miguez@csic.es.
- Saliba M Laboratory for Photonics and Interfaces , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , CH-1015-Lausanne , Switzerland.
- Anguita P Institute of Materials Science of Seville , Spanish National Research Council-University of Seville , Américo Vespucio 49 , 41092 , Seville , Spain . Email: h.miguez@csic.es.
- Roose B Adolphe Merkle Institute , Chemin des Verdiers 4 , CH-1700 Fribourg , Switzerland.
- Abate A Laboratory for Photonics and Interfaces , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , CH-1015-Lausanne , Switzerland.
- Steiner U Adolphe Merkle Institute , Chemin des Verdiers 4 , CH-1700 Fribourg , Switzerland.
- Grätzel M Laboratory for Photonics and Interfaces , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , CH-1015-Lausanne , Switzerland.
- Calvo ME Institute of Materials Science of Seville , Spanish National Research Council-University of Seville , Américo Vespucio 49 , 41092 , Seville , Spain . Email: h.miguez@csic.es.
- Hagfeldt A Laboratory for Photomolecular Science , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , CH-1015-Lausanne , Switzerland . Email: juan.correa@epfl.ch.
- Míguez H Institute of Materials Science of Seville , Spanish National Research Council-University of Seville , Américo Vespucio 49 , 41092 , Seville , Spain . Email: h.miguez@csic.es.
- 2016-10-25
Published in:
- Journal of materials chemistry. A. - 2016
English
Organic-inorganic perovskite structures in which lead is substituted by tin are exceptional candidates for broadband light absorption. Herein we present a thorough analysis of the optical properties of CH3NH3Sn x Pb1-x I3 films, providing the field with definitive insights about the possibilities of these materials for perovskite solar cells of superior efficiency. We report a user's guide based on the first set of optical constants obtained for a series of tin/lead perovskite films, which was only possible to measure due to the preparation of optical quality thin layers. According to the Shockley-Queisser theory, CH3NH3Sn x Pb1-x I3 compounds promise a substantial enhancement of both short circuit photocurrent and power conversion efficiency in single junction solar cells. Moreover, we propose a novel tandem architecture design in which both top and bottom cells are made of perovskite absorbers. Our calculations indicate that such perovskite-on-perovskite tandem devices could reach efficiencies over 35%. Our analysis serves to establish the first roadmap for this type of cells based on actual optical characterization data. We foresee that this study will encourage the research on novel near-infrared perovskite materials for photovoltaic applications, which may have implications in the rapidly emerging field of tandem devices.
- Language
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- English
- Open access status
- hybrid
- Identifiers
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- DOI 10.1039/c6ta04840d
- PMID 27774148
- Persistent URL
- https://folia.unifr.ch/global/documents/190546
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