DataVXAdvanced Functional MaterialsPaper
journal article·2021-07Open access

Benzylammonium‐Mediated Formamidinium Lead Iodide Perovskite Phase Stabilization for Photovoltaics

Anwar Q. Alanazi, Masaud H. Almalki, Aditya Mishra, Dominik J. Kubicki, Zaiwei Wang, Lena Merten, Felix T. Eickemeyer, Hong Zhang, Dan Ren, Ahmed Y. Alyamani, Hamad Albrithen, Abdulrahman Albadri, Mohammad Hayal Alotaibi, Alexander Hinderhofer, Shaik M. Zakeeruddin, Frank Schreiber, Anders Hagfeldt, Lyndon Emsley, Jovana V. Milić, Michael Graetzel

Advanced Functional Materials· Volume 31· Issue 30
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Abstract

Abstract There is an ongoing surge of interest in the use of formamidinium (FA) lead iodide perovskites in photovoltaics due to their exceptional optoelectronic properties. However, thermodynamic instability of the desired cubic perovskite (α‐FAPbI3) phase at ambient conditions leads to the formation of a yellow non‐perovskite (δ‐FAPbI3) phase that compromises its utility. A stable α‐FAPbI3 perovskite phase is achieved by employing benzylammonium iodide (BzI) and the microscopic structure is elucidated by using solid‐state NMR spectroscopy and X‐ray scattering measurements. Perovskite solar cells based on the FAPbI3(BzI)0.25 composition achieve power conversion efficiencies exceeding 20%, which is accompanied by enhanced shelf‐life and operational stability, maintaining 80% of the performance after one year at ambient conditions.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · 2D Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory of Photonics and Interfaces Institute of Chemical Sciences and Engineering School of Basic Sciences Ecole Polytechnique Fédérale de Lausanne Lausanne CH‐1015 Switzerland

Laboratory of Magnetic Resonance Institute of Chemical Sciences and Engineering School of Basic Sciences Ecole Polytechnique Fédérale de Lausanne Lausanne CH‐1015 Switzerland

Laboratory of Photomolecular Science Institute of Chemical Sciences Engineering Ecole Polytechnique Fedérale de Lausanne (EPFL) Lausanne 1015 Switzerland

Institut für Angewandte Physik Universität Tübingen Auf der Morgenstelle 10 72076 Tübingen Germany

National Center for Nanotechnology King Abdulaziz City for Science and Technology P.O. Box 6086 Riyadh 11442 Saudi Arabia

Physics and Astronomy Department‐Research Chair for Tribology Surface and Interface Sciences College of Science and King Abdullah Institute for Nanotechnology‐Aramco Laboratory for Applied Sensing Research King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia

K.A.CARE Energy Research and Innovation Center at Riyadh Riyadh 11451 Saudi Arabia

Funding

King Abdulaziz City for Science and Technology · Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

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