Artículo
Optical analysis of CH3NH3SnxPb1–xI3 absorbers: a roadmap for perovskite-on-perovskite tandem solar cells
Autor/es | Anaya Martín, Miguel
Correa Baena, Juan P. Lozano Barbero, Gabriel Sebastián Saliba, Michael Anguita, Pablo Calvo Roggiani, Mauricio Míguez García, Hernán Ruy |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2016 |
Fecha de depósito | 2017-09-25 |
Publicado en |
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Resumen | 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 CH3NH3SnxPb1–xI3 ... 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 CH3NH3SnxPb1–xI3 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, CH3NH3SnxPb1–xI3 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. |
Agencias financiadoras | European Union (UE). FP7 Ministerio de Economía y Competitividad (MINECO). España |
Identificador del proyecto | info:eu-repo/grantAgreement/MINECO/AT2014-54852-R
info:eu-repo/grantAgreement/EC/FP7/307081 |
Cita | Anaya Martín, M., Correa Baena, J.P., Lozano, G., Saliba, M., Anguita, ., Calvo Roggiani, M.E. y Míguez García, H.R. (2016). Optical analysis of CH3NH3SnxPb1–xI3 absorbers: a roadmap for perovskite-on-perovskite tandem solar cells. Journal of Materials Chemistry A: Materials for energy and sustainability, 4 (29), 11214-11221. |
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