Multimodal host–guest complexation for efficient and stable perovskite photovoltaics

Hong Zhang, Felix Thomas Eickemeyer, Zhiwen Zhou, Marko Mladenović, Farzaneh Jahanbakhshi, Lena Merten, Alexander Hinderhofer, Michael A. Hope, Olivier Ouellette, Aditya Mishra, Paramvir Ahlawat, Dan Ren, Tzu-Sen Su, Anurag Krishna, Zaiwei Wang, Zhaowen Dong, Jinming Guo, Shaik M. Zakeeruddin, Frank Schreiber, Anders Hagfeldt, Lyndon Emsley, Ursula Rothlisberger, Jovana V. Milić () and Michael Grätzel ()
Additional contact information
Hong Zhang: École Polytechnique Fédérale de Lausanne
Felix Thomas Eickemeyer: École Polytechnique Fédérale de Lausanne
Zhiwen Zhou: École Polytechnique Fédérale de Lausanne
Marko Mladenović: École Polytechnique Fédérale de Lausanne
Farzaneh Jahanbakhshi: École Polytechnique Fédérale de Lausanne
Lena Merten: Universität Tübingen
Alexander Hinderhofer: Universität Tübingen
Michael A. Hope: École Polytechnique Fédérale de Lausanne
Olivier Ouellette: École Polytechnique Fédérale de Lausanne
Aditya Mishra: École Polytechnique Fédérale de Lausanne
Paramvir Ahlawat: École Polytechnique Fédérale de Lausanne
Dan Ren: École Polytechnique Fédérale de Lausanne
Tzu-Sen Su: École Polytechnique Fédérale de Lausanne
Anurag Krishna: École Polytechnique Fédérale de Lausanne
Zaiwei Wang: École Polytechnique Fédérale de Lausanne
Zhaowen Dong: École Polytechnique Fédérale de Lausanne
Jinming Guo: École Polytechnique Fédérale de Lausanne
Shaik M. Zakeeruddin: École Polytechnique Fédérale de Lausanne
Frank Schreiber: Universität Tübingen
Anders Hagfeldt: École Polytechnique Fédérale de Lausanne
Lyndon Emsley: École Polytechnique Fédérale de Lausanne
Ursula Rothlisberger: École Polytechnique Fédérale de Lausanne
Jovana V. Milić: École Polytechnique Fédérale de Lausanne
Michael Grätzel: École Polytechnique Fédérale de Lausanne

Nature Communications, 2021, vol. 12, issue 1, 1-11

Abstract: Abstract Formamidinium lead iodide perovskites are promising light-harvesting materials, yet stabilizing them under operating conditions without compromising optimal optoelectronic properties remains challenging. We report a multimodal host–guest complexation strategy to overcome this challenge using a crown ether, dibenzo-21-crown-7, which acts as a vehicle that assembles at the interface and delivers Cs+ ions into the interior while modulating the material. This provides a local gradient of doping at the nanoscale that assists in photoinduced charge separation while passivating surface and bulk defects, stabilizing the perovskite phase through a synergistic effect of the host, guest, and host–guest complex. The resulting solar cells show power conversion efficiencies exceeding 24% and enhanced operational stability, maintaining over 95% of their performance without encapsulation for 500 h under continuous operation. Moreover, the host contributes to binding lead ions, reducing their environmental impact. This supramolecular strategy illustrates the broad implications of host–guest chemistry in photovoltaics.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23566-2

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DOI: 10.1038/s41467-021-23566-2

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