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Hot electron injection into semiconducting polymers in polymer based-perovskite solar cells and their fate

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Abstract

Metal halide perovskites are known to possess upon photoexcitation long-lived hot carriers. By using femtosecond laser transient absorption spectroscopy, we probed in the current work interfacial charge transfer, that is, hot electrons and holes in methylammonium lead iodide perovskite. The focus was, on the one hand, on titanium dioxide as an electron transporting material and, on the other hand, on several organic semiconducting materials as hole transporting materials in perovskite solar cells. An unexpected carrier loss pathway for hot electrons was found in the form of injection into the low lying LUMOs of several organic semiconducting materials. Of great importance is the fact that the final photocurrents of perovskite solar cells scale with the suppression of this newly discovered loss pathway.

Graphical abstract: Hot electron injection into semiconducting polymers in polymer based-perovskite solar cells and their fate

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Publication details

The article was received on 24 Jul 2019, accepted on 15 Oct 2019 and first published on 31 Oct 2019


Article type: Paper
DOI: 10.1039/C9NR06297A
Nanoscale, 2019, Advance Article

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    Hot electron injection into semiconducting polymers in polymer based-perovskite solar cells and their fate

    J. Jiménez-López, B. M. D. Puscher, W. Cambarau, R. H. Fink, E. Palomares and D. M. Guldi, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR06297A

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