Modulating competitive adsorption of hybrid self-assembled molecules for efficient wide-bandgap perovskite solar cells and tandems

The employment of self-assembled molecular hybrid could improve buried interface in perovskite solar cells (PSCs). However, the interplay among hybrid self-assembled monolayers (SAMs) during the deposition process has not been well-studied. Herein, we study the interaction between co-adsorbents and commonly used SAM material, [4-(3,6-dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) for wide-bandgap (WBG) PSCs. It is found that the co-adsorbent, 6-aminohexane-1-sulfonic acid (SA) tends to fill the uncovered sites without interference with Me-4PACz, ensuring the formation of a dense hole selective layer. Moreover, the use of SA/Me-4PACz mixed SAMs could effectively reduce the interfacial non-radiative recombination loss, optimize the energy alignment at the buried interface and regulate the crystallization of WBG perovskite. As a result, the 1.77 eV WBG PSCs deliver a power conversion efficiency (PCE) of 20.67% (20.21% certified) and an impressive open-circuit voltage (V<sub>OC</sub>) of 1.332 V (1.313 V certified). By combining with a 1.26 eV narrow-bandgap (NBG) PSC, we further fabricate 2-terminal all-perovskite tandem solar cells (TSCs) with a PCE of 28.94% (28.78% certified) for 0.087 cm<sup>2</sup> and 23.92% for mini-module with an aperture area of 11.3 cm<sup>2</sup>.

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Publication Details

Journal
Nature Communications
Published
2025-03-28
DOI
https://doi.org/10.1038/s41467-025-58111-y
Citations
59
Primary Topic
Perovskite Materials and Applications
Type
article
Field-Weighted Citation Impact
43.10

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article

Modulating competitive adsorption of hybrid self-assembled molecules for efficient wide-bandgap perovskite solar cells and tandems

X. Lei, Zhichun Yang, Xiaojun Qin, Yongyan Pan et al.
59 citations
Nature Communications
Perovskite Materials and Applications
43.10
article

Modulating competitive adsorption of hybrid self-assembled molecules for efficient wide-bandgap perovskite solar cells and tandems

X. Lei, Zhichun Yang, Xiaojun Qin, Yongyan Pan, Sanwan Liu, Qisen Zhou, Zonghao Liu, Jingbai Li, Zhengtian Tan, Zhiguo Zhao, Wei Chen, Rui Chen, Weitao Wang, Jianan Wang, Wenguang Liu, He Zhu, Zhengjing Zhao, Chenyang Shi, Zihe Cai, Jiaqi Zhang
article en
59 citations

Abstract

The employment of self-assembled molecular hybrid could improve buried interface in perovskite solar cells (PSCs). However, the interplay among hybrid self-assembled monolayers (SAMs) during the deposition process has not been well-studied. Herein, we study the interaction between co-adsorbents and commonly used SAM material, [4-(3,6-dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) for wide-bandgap (WBG) PSCs. It is found that the co-adsorbent, 6-aminohexane-1-sulfonic acid (SA) tends to fill the uncovered sites without interference with Me-4PACz, ensuring the formation of a dense hole selective layer. Moreover, the use of SA/Me-4PACz mixed SAMs could effectively reduce the interfacial non-radiative recombination loss, optimize the energy alignment at the buried interface and regulate the crystallization of WBG perovskite. As a result, the 1.77 eV WBG PSCs deliver a power conversion efficiency (PCE) of 20.67% (20.21% certified) and an impressive open-circuit voltage (V<sub>OC</sub>) of 1.332 V (1.313 V certified). By combining with a 1.26 eV narrow-bandgap (NBG) PSC, we further fabricate 2-terminal all-perovskite tandem solar cells (TSCs) with a PCE of 28.94% (28.78% certified) for 0.087 cm<sup>2</sup> and 23.92% for mini-module with an aperture area of 11.3 cm<sup>2</sup>.

Nature CommunicationsVol. 16(1)
Shanxi University (CN), Shenzhen Polytechnic University (CN), Huawei Technologies (China) (CN), Southern University of Science and Technology (CN), Huaneng Clean Energy Research Institute (CN), Wuhan National Laboratory for Optoelectronics (CN), Hubei University of Education (CN), State Key Laboratory of Quantum Optics and Quantum Optics Devices, Huazhong University of Science and Technology (CN), The University of Tokyo (JP)
National Natural Science Foundation of China, China Postdoctoral Science Foundation, Natural Science Foundation of Hubei Province
Affordable and clean energy
Openalex Percentile: Top 0%
Perovskite Materials and Applications
43.10
DOIOpen Access PDFOpenAlex
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