Article

Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance

Michael SalibaLaboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, SwitzerlandTaisuke MatsuiAdvanced Research Division, Materials Research Laboratory, Panasonic Corporation, 1006 Kadoma, Kadoma City, Osaka 571-8501, JapanKonrad DomanskiLaboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, SwitzerlandJi‐Youn SeoLaboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, SwitzerlandAmita UmmadisinguLaboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, SwitzerlandShaik M. ZakeeruddinLaboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, SwitzerlandJuan‐Pablo Correa‐BaenaLaboratory of Photomolecular Science, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, SwitzerlandWolfgang TressLaboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, SwitzerlandAntonio AbateLaboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, SwitzerlandAnders HagfeldtLaboratory of Photomolecular Science, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, SwitzerlandMichaël GrätzelLaboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, Switzerland

2016en

ABI

Abstract

Improving the stability of perovskite solar cells Inorganic-organic perovskite solar cells have poor long-term stability because ultraviolet light and humidity degrade these materials. Bella et al. show that coating the cells with a water-proof fluorinated polymer that contains pigments to absorb ultraviolet light and re-emit it in the visible range can boost cell efficiency and limit photodegradation. The performance and stability of inorganic-organic perovskite solar cells are also limited by the size of the cations required for forming a correct lattice. Saliba et al. show that the rubidium cation, which is too small to form a perovskite by itself, can form a lattice with cesium and organic cations. Solar cells based on these materials have efficiencies exceeding 20% for over 500 hours if given environmental protection by a polymer coating. Science , this issue pp. 203 and 206

Identifiers

DOI: 10.1126/science.aah5557

Citations and references

Cited by 30 references

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