journal article·2021-11-12Open access

Interfacial Passivation Engineering of Perovskite Solar Cells with Fill Factor over 82% and Outstanding Operational Stability on n-i-p Architecture

Bowen Yang, Jiajia Suo, Francesco Di Giacomo, Selina Olthof, Dmitry Bogachuk, YeonJu Kim, Xiaoxiao Sun, Lukas Wagner, Fan Fu, Shaik M. Zakeeruddin, Andreas Hinsch, Michael Grätzel, Aldo Di Carlo, Anders Hagfeldt

ACS Energy Letters· Volume 6· Issue 11

Abstract

Tremendous efforts have been dedicated toward minimizing the open-circuit voltage deficits on perovskite solar cells (PSCs), and the fill factors are still relatively low. This hinders their further application in large scalable modules. Herein, we employ a newly designed ammonium salt, cyclohexylethylammonium iodide (CEAI), for interfacial engineering between the perovskite and hole-transporting layer (HTL), which enhanced the fill factor to 82.6% and consequent PCE of 23.57% on the target device. This can be associated with a reduction of the trap-assisted recombination rate at the 3D perovskite surface, via formation of a 2D perovskite interlayer. Remarkably, the property of the 2D perovskite interlayer along with the cyclohexylethyl group introduced by CEAI treatment also determines a pronounced enhancement in the surface hydrophobicity, leading to an outstanding stability of over 96% remaining efficiency of the passivated devices under maximum power point tracking with one sun illumination under N2 atmosphere at room temperature after 1500 h.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

Ångström Laboratory, Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden

Centre for Hybrid and Organic Solar Energy (CHOSE), Department of Electronic Engineering, University of Rome Tor Vergata, Rome 00133, Italy

Institute for Physical Chemistry, University of Cologne, Greinstraße 4-6, 50939 Cologne, Germany

Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstraße 2, 79110 Freiburg, Germany

Department of Sustainable Systems Engineering (INATECH), Albert-Ludwigs-Universität Freiburg, Emmy-Noether-straße 2, 79110 Freiburg, Germany

Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Duebendorf, Switzerland

Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

Institute for Structure of the Matter, National Research Council (ISM-CNR), Rome 00133, Italy

Funding

Bundesministerium f??r Bildung und Forschung · Eidgen??ssische Technische Hochschule Z??rich · Deutsche Bundesstiftung Umwelt · Schweizerischer Nationalfonds zur F??rderung der Wissenschaftlichen Forschung · H2020 Energy

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