Halogen-containing ultrathin 2D MOF nanosheets for enhanced stability and efficiency in perovskite solar cells

Halogen-containing ultrathin 2D MOF nanosheets for enhanced stability and efficiency in perovskite solar cells Full article

Journal

Journal of Energy Chemistry
ISSN: 2096-885X

Output data

Year: 2026, Volume: 115, Pages: 121-128 Pages count : 8 DOI: 10.1016/j.jechem.2025.11.020

Authors

Wang Wei ^1,2 , Wang Jiaqi ³ , Zhang Jian ² , Lin Kaifeng ² , Hu Boyuan ² , Zhang Xingrui ² , Dong Yayu ² , Xia Debin ² , Tretyakov Evgeny ⁴ , Yang Yulin ²

Affiliations

1	College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001 Henan, China
2	MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001 Heilongjiang, China
3	College of Tobacco Science and Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001 Henan, China
4	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Av. 47, Moscow 119991, Russia

Funding (1)

Morphological imperfections and phase segregation at the buried perovskite interface have posed significant challenges to further enhancing the efficiency of perovskite solar cells (PSCs). In this work, a halogen-functionalized porphyrin-based metal–organic framework (MOF) nanosheet, Cu-TCPP(I), is introduced as a multifunctional buffer layer at the SnO2/perovskite interface. The Cu-TCPP(I) nanosheets effectively passivate interfacial defects, regulate crystallization kinetics, and stabilize the photoactive α-phase perovskite against undesirable transition to the δ-phase. This interfacial engineering strategy enhances charge extraction efficiency and suppresses non-radiative recombination, enabling devices to achieve a champion power conversion efficiency (PCE) of 24.62 % with negligible hysteresis. The optimized devices retain 92 % of their initial PCE after 1600 h of storage under ambient conditions, demonstrating excellent operational stability. Importantly, the Cu-TCPP(I) interlayer exhibits strong lead-chelating capability, significantly reducing the risk of lead leakage. This multifunctional interfacial design presents a promising route toward high-efficiency, stable, and environmentally friendly PSCs for large-scale photovoltaic applications.

Wang W. , Wang J. , Zhang J. , Lin K. , Hu B. , Zhang X. , Dong Y. , Xia D. , Tretyakov E. , Yang Y.
Halogen-containing ultrathin 2D MOF nanosheets for enhanced stability and efficiency in perovskite solar cells
Journal of Energy Chemistry. 2026. V.115. P.121-128. DOI: 10.1016/j.jechem.2025.11.020 OpenAlex

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