Surface chemical polishing and passivation minimize non-radiative recombination for all-perovskite tandem solar cells
All-perovskite tandem solar cells have shown great promise in breaking the Shockley-Queisser limit of single-junction solar cells. However, the efficiency improvement of all-perovskite tandem solar cells is largely hindered by the surface defects induced non-radiative recombination loss in Sn-Pb mixed narrow bandgap perovskite films. Here, we report a surface reconstruction strategy utilizing a surface polishing agent, 1,4-butanediamine, together with a surface passivator, ethylenediammonium diiodide, to eliminate Sn-related defects and passivate organic cation and halide vacancy defects on the surface of Sn-Pb mixed perovskite films. Our strategy not only delivers high-quality Sn-Pb mixed perovskite films with a close-to-ideal stoichiometric ratio surface but also minimizes the non-radiative energy loss at the perovskite/electron transport layer interface. As a result, our Sn-Pb mixed perovskite solar cells with bandgaps of 1.32 and 1.25 eV realize power conversion efficiencies of 22.65% and 23.32%, respectively. Additionally, we further obtain a certified power conversion efficiency of 28.49% of two-junction all-perovskite tandem solar cells.
Authors
- Yong Cai (ORCID: https://orcid.org/0000-0001-9849-0658)
- Xiaojun Qin
- Neng Li (ORCID: https://orcid.org/0000-0001-9633-6702)
- Zhongyong Zhang (ORCID: https://orcid.org/0009-0006-1406-0292)
- Rui Chen (ORCID: https://orcid.org/0000-0003-3605-0555)
- Yongyan Pan
- Yitong Ji (ORCID: https://orcid.org/0009-0000-9633-5769)
- Sanwan Liu
- Wenchao Huang (ORCID: https://orcid.org/0000-0003-4992-1727)
- Zonghao Liu (ORCID: https://orcid.org/0000-0003-4743-6971)
- Huande Sun
- Fumeng Ren
- Zhiguo Zhao (ORCID: https://orcid.org/0000-0002-5997-5940)
- Wei Chen (ORCID: https://orcid.org/0000-0002-2418-9210)
- Bin Liu (ORCID: https://orcid.org/0000-0002-7971-3841)
- Jianan Wang (ORCID: https://orcid.org/0000-0001-8411-7641)
- Zheng Zhou (ORCID: https://orcid.org/0000-0002-9101-9932)
- Zhengjing Zhao (ORCID: https://orcid.org/0000-0002-3033-9748)
- Chenyang Shi (ORCID: https://orcid.org/0000-0002-2274-4305)
- Zihe Cai (ORCID: https://orcid.org/0000-0002-3246-1763)
- Jiaqi Zhang (ORCID: https://orcid.org/0000-0002-7449-4176)
- Zhenxing Sun (ORCID: https://orcid.org/0000-0002-8523-0117)
Institutions
- Wuhan University of Technology (CN)
- Huawei Technologies (China) (CN)
- Huaneng Clean Energy Research Institute (CN)
- Hubei University of Arts and Science (CN)
- Wuhan National Laboratory for Optoelectronics (CN)
- Hubei University of Education (CN)
- Huazhong University of Science and Technology (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2024-08-26
- DOI
- https://doi.org/10.1038/s41467-024-51703-0
- Citations
- 120
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 25.04
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Natural Science Foundation of Hubei Province
- Fundamental Research Funds for the Central Universities