Issue 16, 2024

Rational heterostructure stacking enables 23% wide-bandgap perovskite solar cells by side-reaction inhibition

Abstract

Wide-bandgap (WBG) perovskite solar cells (PSCs) attract intensive attention because of their high tandem compatibility and versatile application scenarios. However, severe interfacial non-radiative recombination of mixed-ion WBG perovskite films was caused by complex defect types and phase impurities, leading to deteriorated device performance and stability. Herein, a rational surface heterostructure design was achieved by precisely constructing a two-dimensional Dion–Jacobson layer atop the 3D WBG layer by inhibiting surface side reactions. A dual-ammonium strategy was screened out to block undesired molecular interactions, refining surface lattice structures and energy landscapes to interfacial defect reduction, charge transport acceleration, and phase stability prolongation. A champion WBG PSC (active area: 0.10 cm2) based on the optimized 1.68 eV perovskite film achieved an impressive efficiency of 23.05% (certified 22.58%) with an open-circuit voltage of 1.25 V, plus a large-area (1.00 cm2) efficiency exceeding 21.25% and a mini-module (7.26 cm2) efficiency of 20.10%.

Graphical abstract: Rational heterostructure stacking enables 23% wide-bandgap perovskite solar cells by side-reaction inhibition

Supplementary files

Article information

Article type
Paper
Submitted
08 Apr 2024
Accepted
08 Jul 2024
First published
11 Jul 2024

Energy Environ. Sci., 2024,17, 5984-5992

Rational heterostructure stacking enables 23% wide-bandgap perovskite solar cells by side-reaction inhibition

T. Huang, F. Xu, J. Hu, J. Wu, S. Li, P. Chen, X. Jia, Q. Li, H. Yan, Y. Ji, D. Luo, D. Wang, J. Hu, H. Chen, Z. Lu, H. Xu, L. Li, R. Sha, Q. Zhong, X. Bai, M. I. Dar, T. Song, Z. Li, X. Yang, L. Zhao, Z. Lu, Q. Gong and R. Zhu, Energy Environ. Sci., 2024, 17, 5984 DOI: 10.1039/D4EE01547A

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