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Open AccessFeature PaperArticle

Molecular Doping for Hole Transporting Materials in Hybrid Perovskite Solar Cells

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School of Engineering and Materials Science (SEMS), Queen Mary University of London, Mile End Road, London E1 4NS, UK
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Department of Materials Science and Milan-Bicocca Solar Energy Research Center–MIB-Solar University of Milan-Bicocca, Via Cozzi 55, 20125 Milano, Italy
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Department of Mathematics and Physics “E. De Giorgi” University of Salento, 73100 Lecce, Italy
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Istituto di Nanotecnologia CNR-Nanotec, Polo di Nanotecnologia c/o Campus Ecotekne via Monteroni, 73100 Lecce, Italy
*
Author to whom correspondence should be addressed.
Metals 2020, 10(1), 14; https://doi.org/10.3390/met10010014
Received: 4 December 2019 / Revised: 14 December 2019 / Accepted: 16 December 2019 / Published: 20 December 2019
(This article belongs to the Special Issue Application and Characterisation of Hybrid Halide Perovskites)
Hybrid lead halide perovskites have been revolutionary in the photovoltaic research field, reaching efficiencies comparable with the most established photovoltaic technologies, although they have not yet reached their competitors’ stability. The search for a stable configuration requires the engineering of the charge extraction layers; in this work, molecular doping is used as an efficient method for small molecules and polymers employed as hole transport materials in a planar heterojunction configuration on compact-TiO2. We proved the viability of this approach, obtaining significantly increased performances and reduced hysteresis on compact titania-based devices. We investigated the photovoltaic performance correlated to the hole transport material structure. We have demonstrated that the molecular doping mechanism is more reliable than oxidative doping and have verified that molecular doping in polymeric hole transport materials leads to highly efficient perovskite solar cells, with long-term stability. View Full-Text
Keywords: molecular doping; perovskite solar cell; stability; hysteresis; F4-TCNQ molecular doping; perovskite solar cell; stability; hysteresis; F4-TCNQ
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MDPI and ACS Style

Trifiletti, V.; Degousée, T.; Manfredi, N.; Fenwick, O.; Colella, S.; Rizzo, A. Molecular Doping for Hole Transporting Materials in Hybrid Perovskite Solar Cells. Metals 2020, 10, 14.

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