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journal article·2024-06Open access

An Integrated Deposition and Passivation Strategy for Controlled Crystallization of 2D/3D Halide Perovskite Films

Tim Kodalle, Mahdi Malekshahi Byranvand, Meredith Goudreau, Chittaranjan Das, Rajarshi Roy, Małgorzata Kot, Simon Briesenick, Mohammadreza Zohdi, Monika Rai, Nobumichi Tamura, Jan Ingo Flege, Wolfram Hempel, Carolin M. Sutter‐Fella, Michael Saliba

Advanced Materials· Volume 36· Issue 24
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Abstract

Abstract This work introduces a simplified deposition procedure for multidimensional (2D/3D) perovskite thin films, integrating a phenethylammonium chloride (PEACl)‐treatment into the antisolvent step when forming the 3D perovskite. This simultaneous deposition and passivation strategy reduces the number of synthesis steps while simultaneously stabilizing the halide perovskite film and improving the photovoltaic performance of resulting solar cell devices to 20.8%. Using a combination of multimodal in situ and additional ex situ characterizations, it is demonstrated that the introduction of PEACl during the perovskite film formation slows down the crystal growth process, which leads to a larger average grain size and narrower grain size distribution, thus reducing carrier recombination at grain boundaries and improving the device's performance and stability. The data suggests that during annealing of the wet film, the PEACl diffuses to the surface of the film, forming hydrophobic (quasi‐)2D structures that protect the bulk of the perovskite film from humidity‐induced degradation.
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Research context

Electronic materialsMaterials processing

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Coral and Marine Ecosystems Studies

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

Affiliations

Molecular Foundry Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley California 94720 USA

Advanced Light Source Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley California 94720 USA

Institute for Photovoltaics University of Stuttgart Pfaffenwaldring 47 70569 Stuttgart Germany

Helmholtz Young Investigator Group FRONTRUNNER IEK5‐Photovoltaik Forschungszentrum Jülich 52425 Jülich Germany

Chair of Applied Physics and Semiconductor Spectroscopy Brandenburg University of Technology Cottbus‐Senftenberg 03046 Cottbus Germany

Department of Physics, Ernest Rutherford Physics Building McGill University 3600 Rue University Montrèal QC H3A 2T8 Canada

Zentrum für Sonnenenergie‐ und Wasserstoff‐Forschung Baden‐Württemberg (ZSW) 70563 Stuttgart Germany

Funding

Deutsche Forschungsgemeinschaft · U.S. Department of Energy · Office of Science · Basic Energy Sciences · University of California · Albert Ellis Institute · Bundesministerium für Wirtschaft und Energie · European Research Council

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