Issue 11, 2025

Boosting the efficiency and stability of two-step perovskite solar cells by a hydroxylamine-driven additive strategy

Abstract

High quality perovskite films are commonly prepared using a two-step deposition method. However, residual PbI2 in perovskite solar cells is often associated with lower efficiency and poorer reproducibility. In this study, a multifunctional additive, N-Cbz-hydroxylamine (Cbz), is designed to enhance the quality of perovskite films. According to our results, Cbz effectively passivates defects by forming both hydrogen bonds and chemical linkages with PbI2 and FAI, reducing trap-state density, suppressing non-radiative recombination, and aligning energy levels. Consequently, the Cbz-based perovskite solar cells demonstrate significantly improved efficiency and stability by retaining 84% of their original efficiency after 3000 hours under ambient conditions. This work presents an effective strategy for producing high-quality perovskite films, enabling the development of high-performance perovskite solar cells.

Graphical abstract: Boosting the efficiency and stability of two-step perovskite solar cells by a hydroxylamine-driven additive strategy

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Article information

Article type
Paper
Submitted
14 Nov 2024
Accepted
24 Jan 2025
First published
17 Feb 2025

J. Mater. Chem. A, 2025,13, 8044-8051

Boosting the efficiency and stability of two-step perovskite solar cells by a hydroxylamine-driven additive strategy

M. Chen, Y. Chen, N. Wang, X. Zhu, S. Yang, D. Bai, F. Yu, D. Yang and S. Liu, J. Mater. Chem. A, 2025, 13, 8044 DOI: 10.1039/D4TA08074B

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