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

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Názov: Modulating competitive adsorption of hybrid self-assembled molecules for efficient wide-bandgap perovskite solar cells and tandems.
Autori: Shi, Chenyang, Wang, Jianan, Lei, Xia, Zhou, Qisen, Wang, Weitao, Yang, Zhichun, Liu, Sanwan, Zhang, Jiaqi, Zhu, He, Chen, Rui, Pan, Yongyan, Tan, Zhengtian, Liu, Wenguang, Zhao, Zhengjing, Cai, Zihe, Qin, Xiaojun, Zhao, Zhiguo, Li, Jingbai, Liu, Zonghao, Chen, Wei
Zdroj: Nature Communications; 3/28/2025, Vol. 16 Issue 1, p1-11, 11p
Abstrakt: 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 (VOC) 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 cm2 and 23.92% for mini-module with an aperture area of 11.3 cm2.The interplay among hybrid self-assembled monolayers (SAMs) during deposition has not been well studied. Here, authors mix co-adsorbents with carbazole-based SAM material to improve the buried interface, achieving efficiency of 20.67% for wide-bandgap solar cells and 28.94% for all-perovskite tandem devices. [ABSTRACT FROM AUTHOR]
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Databáza: Complementary Index
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Abstrakt: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<subscript>OC</subscript>) 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>.The interplay among hybrid self-assembled monolayers (SAMs) during deposition has not been well studied. Here, authors mix co-adsorbents with carbazole-based SAM material to improve the buried interface, achieving efficiency of 20.67% for wide-bandgap solar cells and 28.94% for all-perovskite tandem devices. [ABSTRACT FROM AUTHOR]
ISSN:20411723
DOI:10.1038/s41467-025-58111-y