DataVXACS Energy LettersPaper
journal article·2025-06-13Open access

Minimizing Recombination at the Perovskite/C60 Interface through a Volatile Highly Dense Molecular Interlayer

Fangyuan Ye, Shuo Zhang, Felix Lang, Meysam Raoufi, Jianjun Liang, Igal Levine, Hannes Hempel, Dorothee Menzel, Fengshuo Zu, Steve Albrecht, Lars Korte, Christoph Messmer, Jonas Schön, Stefan W. Glunz, Thomas Unold, Norbert Koch, Dieter Neher, Dongting Ye, Yongzhen Wu, Martin Stolterfoht

ACS Energy Letters· Volume 10· Issue 6
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Source abstract

Abstract

High Resolution Image Download MS PowerPoint Slide Advancing inverted perovskite solar cells requires effective strategies to mitigate nonradiative recombination at the perovskite/C 60 interface. Here, we report a volatile material that forms a thin, dense interlayer that essentially eliminates the C 60 -induced nonradiative interfacial recombination loss despite not directly passivating the perovskite surface. Ultraviolet photoelectron spectroscopy highlights that the molecule forms a positive dipole layer on the surface that aligns the perovskite and C 60 energy levels for electron conduction. Furthermore, the molecule’s volatile nature allows the use of a high-concentration solution that enables a high surface coverage (likely >99%) without increasing the thickness. The combination of these two effects yields an effective approach to suppressing interface recombination. The resulting triple cation perovskite solar cells achieved a power conversion efficiency of >25% and the devices maintain >90% of their initial efficiency after 1200 h of operation. Furthermore, the molecule is broadly applicable to various perovskite compositions and bandgaps.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Electronic and Structural Properties of Oxides · Machine Learning in Materials Science

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

Affiliations

Electronic Engineering Department

Chinese University of Hong Kong

Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering

East China University of Science & Technology

Shanghai Electric Hency Solar Technology Co., Ltd.

Shanghai Electric Group Co., Ltd.

Institute of Physics and Astronomy

University of Potsdam

Hebrew University of Jerusalem, Chemistry, Givat Ram 919040, Jerusalem, Israel

Solar Energy Division, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany

Humboldt-Universitat zu Berlin, Institut fur Physik and IRIS Adlershof, Brook-Taylor Straße 6, 12489 Berlin, Germany

Fraunhofer Institute for Solar Energy Systems and INATECH, Chair for Photovoltaic Energy Conversion, University of Freiburg, Emmy-Noether-Str. 2, 79110 Freiburg, Germany

Funding

Project 211 · Deutsche Forschungsgemeinschaft · China Postdoctoral Science Foundation · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Chinese University of Hong Kong · Volkswagen Foundation

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