[en] Solar energy is playing a significant role in the development of a world powered by clean energy sources. In this context, halide perovskite solar cells (PSCs) are considered one of the most promising research lines thanks to their high efficiencies and flexibility, combined with an easy and cheap fabrication process. The possibility of combining different materials and compositions is an excellent advantage of PSCs. However, still, a big limit is posed by the need for a proper energy level alignment between the layers of materials comprising devices. Therefore, it is of utmost interest to develop methods allowing to tune the energy levels of the different materials. In semiconductors physics, a common technique to achieve this purpose is to functionalize the surface of the materials with dipolar molecules. Nevertheless, this has been rarely applied to perovskites because of the highly rough surface of the films. In this study, we show that it is possible to use this technique in hybrid organic–inorganic perovskite semiconductors systematically and tune the direction and magnitude of the shift by controlling the deposition process. These findings offer a toolbox to simplify the application of halide perovskites in optoelectronic devices.
Disciplines :
Physics
Author, co-author :
Canil, Laura; Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialen und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
Cramer, Tobias; Department of Physics and Astronomy, University of Bologna, Viale Berti Pichat 6/2, 40127 Bologna, Italy
Fraboni, Beatrice; Department of Physics and Astronomy, University of Bologna, Viale Berti Pichat 6/2, 40127 Bologna, Italy
Ricciarelli, Damiano; Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Chimiche ‘‘Giulio Natta’’ (CNR-SCITEC), Via Elce di Sotto 8, 06123 Perugia, Italy ; Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
Meggiolaro, Daniele; Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Chimiche ‘‘Giulio Natta’’ (CNR-SCITEC), Via Elce di Sotto 8, 06123 Perugia, Italy
Singh, Ajay ; Department of Electrical and Computer Engineering, Technical University of Munich, 80333 Munich, Germany
Liu, Maning; Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, FI-33014 Tampere, Finland
Rusu, Marin; Department Structure and Dynamics of Energy Materials, Helmholtz-Zentrum Berlin für Materialen und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
Wolff, Christian M.; Institute of Physics and Astronomy, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14776 Potsdam, Germany
Phung, Nga; Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialen und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
Wang, Qiong; Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialen und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
Neher, Dieter; Institute of Physics and Astronomy, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14776 Potsdam, Germany
Unold, Thomas; Department Structure and Dynamics of Energy Materials, Helmholtz-Zentrum Berlin für Materialen und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
Vivo, Paola; Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, FI-33014 Tampere, Finland
Gagliardi, Alessio; Department of Electrical and Computer Engineering, Technical University of Munich, 80333 Munich, Germany
De Angelis, Filippo; Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Chimiche ‘‘Giulio Natta’’ (CNR-SCITEC), Via Elce di Sotto 8, 06123 Perugia, Italy ; Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
Abate, Antonio; Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialen und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany ; Department of Chemical, Materials and Production Engineering, University of Naples, Federico II, Piazzale Tecchio 80, 80125 Fuorigrotta, Naples, Italy
