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Hot Electron Injection into Semiconducting Polymers in Polymer Based-Perovskite Solar Cells and their Fate

Abstract

Upon photoexcitation, metal halide perovskites are known to intrinsically possess long-lived hot electrons and holes. The nature of these hot carriers as well as their significance has recently been extensively studied. Using femtosecond laser transient absorption spectroscopy it was possible to investigate interfacial charge transfer – hot electrons and holes – between methylammonium lead iodide perovskite and titanium dioxide as well as several organic semiconducting materials used as hole transporting materials in perovskite solar cells. An unexpected carrier loss pathway was found, which consists in the injection of hot electrons into low LUMO level organic semiconductor organic materials, which may effect a change in the final photocurrent of efficient perovskite solar cells.

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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, Accepted Manuscript

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    Hot Electron Injection into Semiconducting Polymers in Polymer Based-Perovskite Solar Cells and their Fate

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

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