Issue 7, 2025

Soy protein enables stable perovskite solar cells by defect passivation and ion migration suppression

Abstract

Passivating agents have been explored for enhancing the stability of perovskite solar cells (PSCs). However, previous investigations have been limited to high purity agents, resulting in high costs and restricted material availability. In this study, we investigate abundant and naturally occurring soy protein, which offers abundant functional groups, making it an ideal candidate. Soy protein facilitates the passivation of perovskite via coordination with Pb2+ and hydrogen bonding with I, fostering high-quality perovskite films with reduced defect density and suppressed ion migration, further preventing phase transition and crystal structure collapse of the perovskite in high humidity and thermal stress environments. Consequently, enhanced photovoltaic response and significantly improved stability are exhibited, and thus this study provides a new passivation approach using natural materials toward efficient and stable PSCs.

Graphical abstract: Soy protein enables stable perovskite solar cells by defect passivation and ion migration suppression

Supplementary files

Article information

Article type
Paper
Submitted
21 Oct 2024
Accepted
31 Dec 2024
First published
07 Jan 2025

J. Mater. Chem. A, 2025,13, 5191-5200

Soy protein enables stable perovskite solar cells by defect passivation and ion migration suppression

F. Liu, A. Valencia, X. Zhang, Y. Zhu, X. Bo and W. A. Daoud, J. Mater. Chem. A, 2025, 13, 5191 DOI: 10.1039/D4TA07497A

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