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  Bi-functional interfaces by poly(ionic liquid) treatment in efficient pin and nip perovskite solar cells

Caprioglio, P., Cruz, D., Caicedo-Dávila, S., Zu, F., Sutanto, A. A., Peña-Camargo, F., et al. (2021). Bi-functional interfaces by poly(ionic liquid) treatment in efficient pin and nip perovskite solar cells. Energy & Environmental Science, 14(8), 4508-4522. doi:10.1039/D1EE00869B.

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 Creators:
Caprioglio, Pietro, Author
Cruz, Daniel1, Author           
Caicedo-Dávila, Sebastián, Author
Zu, Fengshuo, Author
Sutanto, Albertus Adrian, Author
Peña-Camargo, Francisco, Author
Kegelmann, Lukas, Author
Meggiolaro, Daniele, Author
Gregori, Luca, Author
Wolff, Christian M., Author
Stiller, Burkhard, Author
Perdigón-Toro, Lorena, Author
Köbler, Hans, Author
Li, Bor, Author
Gutierrez-Partida, Emilio, Author
Lauermann, Iver, Author
Abate, Antonio, Author
Koch, Norbert, Author
De Angelis, Filippo, Author
Rech, Bernd, Author
Grancini, Giulia, AuthorAbou-Ras, Daniel, AuthorNazeeruddin, Mohammad Khaja, AuthorStolterfoht, Martin, AuthorAlbrecht, Steve, AuthorAntonietti, Markus1, Author           Neher, Dieter, Author more..
Affiliations:
1Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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 Abstract: Approaches to boost the efficiency and stability of perovskite solar cells often address one singular problem in a specific device configuration. In this work, we utilize a poly(ionic liquid) (PIL) to introduce a multi-functional interlayer to improve the device efficiency and stability for different perovskite compositions and architectures. The presence of the PIL at the perovskite surface reduces the non-radiative losses down to 60 meV already in the neat material, indicating effective surface trap passivation, thereby pushing the external photoluminescence quantum yield up to 7. In devices, the PIL treatment induces a bi-functionality of the surface where insulating areas act as a blocking layer reducing interfacial charge recombination and increasing the VOC, whereas, at the same time, the passivated neighbouring regions provide more efficient charge extraction, increasing the FF. As a result, these solar cells exhibit outstanding VOC and FF values of 1.17 V and 83 respectively, with the best devices reaching conversion efficiencies up to 21.4. The PIL-treated devices additionally show enhanced stability during maximum power point tracking (>700 h) and unchanged efficiencies after 10 months of shelf storage. By applying the PIL to small and wide bandgap perovskites, and to nip cells, we corroborate the generality of this methodology to improve the efficiency in various cell architectures and perovskite compositions.

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Language(s): eng - English
 Dates: 2021-06-072021
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1039/D1EE00869B
BibTex Citekey: D1EE00869B
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Title: Energy & Environmental Science
  Abbreviation : Energy Environ. Sci.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 14 (8) Sequence Number: - Start / End Page: 4508 - 4522 Identifier: ISSN: 1754-5692