Durable all-inorganic perovskite tandem photovoltaics

Duan C, Zhang K, Peng Z, Li S, Zou F, Wang F, Li J, Zhang Z, Chen C, Zhu Q, Qiu J, Lu X, Li N, Ding L, Brabec C, Gao F, Yan K (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Nature Nature Research

Book Volume: 637

Pages Range: 1111-1117

Journal Issue: 8048

DOI: 10.1038/s41586-024-08432-7

Abstract

All-inorganic perovskites prepared by substituting the organic cations (for example, methylammonium and formamidinium) with inorganic cations (for example, Cs+) are effective concepts to enhance the long-term photostability and thermal stability of perovskite solar cells (PSCs)1,2. Hence, inorganic perovskite tandem solar cells (IPTSCs) are promising candidates for breaking the efficiency bottleneck and addressing the stability issue, too3,4. However, challenges remain in fabricating two-terminal (2T) IPTSCs due to the inferior film formation and deep trap states induced by tin cations5-7. Here a ligand evolution (LE) strategy with p-toluenesulfonyl hydrazide (PTSH) is used to regulate film formation and eliminate deep traps in inorganic narrow-bandgap (NBG) perovskites, enabling the successful development of 2T IPTSCs. Accordingly, the 1.31 eV CsPb0.4Sn0.6I3:LE device delivers a record efficiency of 17.41%. Combined with the 1.92 eV CsPbI2Br top cell, 2T IPTSCs exhibit a champion efficiency of 22.57% (certified, 21.92%). Moreover, IPTSCs are engineered to deliver remarkable durability under maximum power point (MPP) tracking, maintaining 80% of their initial efficiency at 65 °C for 1,510 h and at 85 °C for 800 h. We elucidate that LE deliberately leverages multiple roles for inorganic NBG perovskite growth and anticipate that our study provides an insightful guideline for developing high-efficiency and stable IPTSCs.

Authors with CRIS profile

Kaicheng Zhang Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET) Zijian Peng Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET)

Involved external institutions

South China University of Technology (SCUT) / 华南理工大学 CN China (CN) The Chinese University of Hong Kong (CUHK) CN China (CN) Linköpings universitet / Linköping University SE Sweden (SE) Institute of Metal Research Chinese Academy of Sciences (IMR CAS) CN China (CN) National Center for Nanoscience and Technology (NCNST) / 国家纳米科学中心 CN China (CN)

How to cite

APA:

Duan, C., Zhang, K., Peng, Z., Li, S., Zou, F., Wang, F.,... Yan, K. (2025). Durable all-inorganic perovskite tandem photovoltaics. Nature, 637(8048), 1111-1117. https://doi.org/10.1038/s41586-024-08432-7

MLA:

Duan, Chenghao, et al. "Durable all-inorganic perovskite tandem photovoltaics." Nature 637.8048 (2025): 1111-1117.

BibTeX: Download