Intercalating-Organic-Cation-Induced Stability Bowing in Quasi-2D Metal-Halide Perovskites

Zhang J, Langner S, Wu J, Kupfer C, Lüer L, Meng W, Zhao B, Liu C, Daum M, Osvet A, Li N, Halik M, Stubhan T, Zhao Y, Hauch J, Brabec C (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Book Volume: 7

Pages Range: 70-77

Journal Issue: 1

DOI: 10.1021/acsenergylett.1c02081

Abstract

Quasi-2D metal-halide perovskites with Ruddlesden-Popper structures have shown promising stability due to the protective effects of the intercalating organic cations. However, a systematic study of the effect of intercalating organic cations on stability has rarely been reported. Here we use a high-throughput-robot platform to fabricate over 300 perovskite films and study the effect of cations and their concentrations on the thermal stability of perovskite films. We find that approximately 20-25 mol % of intercalating organic cations into MAPbI3 (nominal n = 4/5) can maximize the film stability, while higher/lower concentrations lead to inferior stability, which is termed stability bowing in analogy to band-gap bowing. A model with two competitive effects of the intercalating organic cation (better protection vs more defects) is proposed to rationalize this behavior. We anticipate this work to provide new insights into the stability of quasi-2D perovskites.

Authors with CRIS profile

Involved external institutions

Helmholtz-Institut Erlangen-Nürnberg für Erneuerbare Energien (HI-ERN) Germany (DE)

How to cite

APA:

Zhang, J., Langner, S., Wu, J., Kupfer, C., Lüer, L., Meng, W.,... Brabec, C. (2022). Intercalating-Organic-Cation-Induced Stability Bowing in Quasi-2D Metal-Halide Perovskites. ACS Energy Letters, 7(1), 70-77. https://doi.org/10.1021/acsenergylett.1c02081

MLA:

Zhang, Jiyun, et al. "Intercalating-Organic-Cation-Induced Stability Bowing in Quasi-2D Metal-Halide Perovskites." ACS Energy Letters 7.1 (2022): 70-77.

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