journal article·2024-06-14Open access

Anion and Cation Migration at 2D/3D Halide Perovskite Interfaces

Raphael F. Moral, Carlo A. R. Perini, Tim Kodalle, Ahyoung Kim, Finn Babbe, Nao Harada, Javid Hajhemati, Philip Schulz, Naomi S. Ginsberg, Shaul Aloni, Craig P. Schwartz, Juan-Pablo Correa-Baena, Carolin M. Sutter-Fella

ACS Energy Letters· Volume 9· Issue 6

Abstract

This study explores the ionic dynamics in 2D/3D perovskite solar cells, which are known for their improved efficiency and stability. The focus is on the impact of halide choice in 3D perovskites treated with phenethylammonium halide salts (PEAX, X = Br and I). Our findings reveal that light and heat drive ionic migration in these structures, with PEA + species diffusing into the 3D film in PEABr-treated samples. Mixed-halide 3D perovskites show halide interdiffusion, with bromine migrating to the surface and iodine diffusing into the film. Cathodoluminescence microscopy reveals localized 2D phases on the 3D perovskite, which become more evenly distributed after thermal treatment. Both PEAX salts enhance the performance of photovoltaic devices. This improvement is attributed to the passivation capabilities of the salts themselves and their respective Ruddlesden−Popper (RP) phases. Annealed PEAI-treated devices show a better balance between efficiency and statistical distribution of photovoltaic parameters.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

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

Affiliations

Nevada Extreme Conditions Laboratory, University of Nevada, Las Vegas, Las Vegas, Nevada 89154, United States

Molecular Foundry Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States

School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States

Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States

Department of Chemistry, University of California, Berkeley, California 94720, United States

Chemical Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States

Institut Photovoltaïque d’Île-de-France (IPVF), Palaiseau 91120, France

CNRS, UMR 9006, Institut Photovoltaïque d’Île-de-France (IPVF), Ecole Polytechnique - IP Paris, Chimie Paristech - PSL, Palaiseau 91120, France

Department of Physics, University of California, Berkeley, California 94720, United States

Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States

Materials Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States

Funding

Chemical Sciences, Geosciences, and Biosciences Division · Agence Nationale de la Recherche · Basic Energy Sciences · Office of Experimental Program to Stimulate Competitive Research · David and Lucile Packard Foundation · National Aeronautics and Space Administration · Division of Electrical, Communications and Cyber Systems · France-Berkeley Fund · Division of Materials Research

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