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A piperidinium salt stabilizes efficient metal-halide perovskite solar cells / Yen-Hung Lin; Nobuya Sakai; Peimei Da; Jiaying Wu; Harry C. Sansom; Alexandra J. Ramadan; Suhas Mahesh; Junliang Liu; Robert D. J. Oliver; Jongchul Lim; Lee Aspitarte; Kshama Sharma; P. K. Madhu; Anna B. Morales‐Vilches; Pabitra K. Nayak; Sai Bai; Feng Gao; Chris R. M. Grovenor; Michael B. Johnston; John G. Labram; James Durrant; James M. Ball; Bernard Wenger; Bernd Stannowski; Henry J. Snaith

Science, Volume: 369, Issue: 6499, Pages: 96 - 102

Swansea University Author: James, Durrant

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DOI (Published version): 10.1126/science.aba1628

Abstract

Longevity has been a long-standing concern for hybrid perovskite photovoltaics. We demonstrate high-resilience positive-intrinsic-negative perovskite solar cells by incorporating a piperidinium-based ionic compound into the formamidinium-cesium lead-trihalide perovskite absorber. With the bandgap tu...

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Published in: Science
ISSN: 0036-8075 1095-9203
Published: American Association for the Advancement of Science (AAAS) 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa54855
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Abstract: Longevity has been a long-standing concern for hybrid perovskite photovoltaics. We demonstrate high-resilience positive-intrinsic-negative perovskite solar cells by incorporating a piperidinium-based ionic compound into the formamidinium-cesium lead-trihalide perovskite absorber. With the bandgap tuned to be well suited for perovskite-on-silicon tandem cells, this piperidinium additive enhances the open-circuit voltage and cell efficiency. This additive also retards compositional segregation into impurity phases and pinhole formation in the perovskite absorber layer during aggressive aging. Under full-spectrum simulated sunlight in ambient atmosphere, our unencapsulated and encapsulated cells retain 80 and 95% of their peak and post-burn-in efficiencies for 1010 and 1200 hours at 60° and 85°C, respectively. Our analysis reveals detailed degradation routes that contribute to the failure of aged cells.
College: College of Engineering
Issue: 6499
Start Page: 96
End Page: 102

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