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3. A Crystalline 2D Fullerene‐Based Metal Halide Semiconductor for Efficient and Stable Ideal‐bandgap Perovskite Solar Cells

Author

Shen, Weicheng, primary, Azmy, Ali, additional, Li, Guang, additional, Mishra, Anamika, additional, Syrgiannis, Zois, additional, Zheng, Wenwen, additional, Volonakis, George, additional, Kepenekian, Mikaël, additional, Even, Jacky, additional, Wojtas, Lukasz, additional, Wang, Cheng, additional, Huang, Lishuai, additional, Chen, Weiqing, additional, Zhou, Shun, additional, Zhou, Jin, additional, Zeng, Guojun, additional, Pu, Dexin, additional, Guan, Hongling, additional, Fang, Guojia, additional, Ke, Weijun, additional, and Spanopoulos, Ioannis, additional

Published
2024
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5. Enhancing Efficiency and Intrinsic Stability of Large‐Area Blade‐Coated Wide‐Bandgap Perovskite Solar Cells Through Strain Release

Author

Pu, Dexin, primary, Zhou, Shun, additional, Guan, Hongling, additional, Jia, Peng, additional, Chen, Guoyi, additional, Fang, Hongyi, additional, Fu, Shiqiang, additional, Wang, Chen, additional, Hushvaktov, Hakim, additional, Jumabaev, Abduvakhid, additional, Meng, Weiwei, additional, Wang, Xingzhu, additional, Fang, Guojia, additional, and Ke, Weijun, additional

Published
2024
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7. Regulating Interfacial Defect and Stress in Tin‐Lead Perovskite Solar Cells

Author

Chen, Weiqing, primary, Guan, Hongling, additional, Huang, Lishuai, additional, Zhou, Jin, additional, Zhou, Shun, additional, Pu, Dexin, additional, Zeng, Guojun, additional, Wang, Chen, additional, Ge, Yansong, additional, Wang, Cheng, additional, Shen, Weicheng, additional, Fang, Hongyi, additional, Li, Guang, additional, Lin, Qingxian, additional, Fang, Guojia, additional, Ke, Weijun, additional, and Liu, Qiming, additional

Published
2023
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8. Regulating Crystal Orientation via Ligand Anchoring Enables Efficient Wide‐Bandgap Perovskite Solar Cells And Tandems

Author

Guan, Hongling, primary, Zhou, Shun, additional, Fu, Shiqiang, additional, Pu, Dexin, additional, Chen, Xuepeng, additional, Ge, Yansong, additional, Wang, Shuxin, additional, Wang, Chen, additional, Cui, Hongsen, additional, Liang, Jiwei, additional, Hu, Xuzhi, additional, Meng, Weiwei, additional, Fang, Guojia, additional, and Ke, Weijun, additional

Published
2023
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10. Efficient Narrow‐bandgap Mixed Tin‐lead Perovskite Solar Cells via Natural Tin Oxide Doping

Author

Huang, Lishuai, primary, Cui, Hongsen, additional, Zhang, Wenjun, additional, Pu, Dexin, additional, Zeng, Guojun, additional, Liu, Yongjie, additional, Zhou, Shun, additional, Wang, Chen, additional, Zhou, Jin, additional, Wang, Cheng, additional, Guan, Hongling, additional, Shen, Weicheng, additional, Li, Guang, additional, Wang, Ti, additional, Zheng, Wenwen, additional, Fang, Guojia, additional, and Ke, Weijun, additional

Published
2023
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14. Optimizing Blade‐Coated Tin–lead Perovskite Solar Cells and Tandems with Multi‐Carboxyl and Amino Group Integration.

Author

Shen, Weicheng, Fang, Hongyi, Pu, Dexin, Zheng, Wenwen, Zhang, Xuhao, Li, Guang, Huang, Lishuai, Zhou, Shun, Chen, Weiqing, Zhou, Yuan, Feng, Zhuo, Liang, Jiwei, Zhou, Jin, Qin, Pingli, Fang, Guojia, and Ke, Weijun

Subjects
*SOLAR cells, *AMINO group, *PEROVSKITE, *CRYSTAL growth, *CARBOXYL group
Abstract

Mixed tin–lead (Sn–Pb) perovskites often face a daunting challenge: rapid and uncontrollable crystallization, leading to a plethora of defects and significant stress. This issue is particularly exacerbated during the blade‐coating preparation of scalable Sn–Pb perovskite films. In this study, a facile strategy involving the addition of ammonium citrate (AC) to narrow‐bandgap mixed Sn–Pb perovskite precursors is introduced. AC, armed with its arsenal of multiple carboxyl and amino groups, acts as a virtuoso conductor, orchestrating controlled crystal growth by harmonizing with Pb2+ and Sn2+ ions. This addition significantly boosts the crystallinity of the perovskite films, alleviates interface stress, inhibits Sn2+ oxidation, and mitigates interfacial defects. Consequently, The blade‐coated AC‐incorporated mixed Sn–Pb perovskite solar cells achieve a high photovoltaic conversion efficiency of nearly 21%. Furthermore, extending this strategy to two‐terminal all‐perovskite tandem solar cells yielded a remarkable maximum efficiency of 27.20%. This work presents an effective strategy for producing efficient blade‐coated mixed Sn–Pb perovskite solar cells, heralding a pathway toward scalable fabrication of all‐perovskite tandem solar cells. [ABSTRACT FROM AUTHOR]

Published
2024
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15. Trapping Tetravalent Tin and Protecting Stannous in Tin‐Lead Mixed Perovskites for Efficient All‐Perovskite Tandem Solar Cells.

Author

Zeng, Guojun, Chen, Weiqing, Guan, Hongling, Meng, Weiwei, Cui, Hongsen, Zhou, Shun, Huang, Lishuai, Pu, Dexin, Fang, Hongyi, Liu, Haiyang, Hou, Shaocong, Yu, Ting, Fang, Guojia, and Ke, Weijun

Subjects
*SOLAR cells, *PEROVSKITE, *POTASSIUM salts, *PRODUCTION sharing contracts (Oil & gas), *FUNCTIONAL groups
Abstract

Tin‐lead (Sn‐Pb) mixed perovskite solar cells (PSCs), which serve as bottom subcells in all‐perovskite tandem solar cells, are pivotal for developing highly efficient solar cells. However, the vulnerability of stannous (Sn2+) to spontaneous oxidation to harmful tetravalent tin (Sn4+) presents significant challenges. Here, a “mouse glue trap” strategy is proposed to mitigate this issue by introducing a multifunctional additive, oxamidic acid potassium salt (OAPS). This approach effectively traps undesired Sn4+ impurities through strong interactions between the oxaminic acid groups of OAPS and Sn4+ impurities. Additionally, OAPS, with its unique functional groups, can inhibit Sn2+ oxidation, passivate defects, alleviate stress, and improve crystalline quality in Sn‐Pb mixed perovskite films. As a result, the enhanced Sn‐Pb mixed narrow‐bandgap PSCs incorporating OAPS achieve a power conversion efficiency of 22.04% and exhibit improved storage stability, with 91% retention after 3072 h of storage in an N2‐filled glovebox. Moreover, all‐perovskite tandem cells using OAPS‐incorporated Sn‐Pb narrow‐bandgap PSCs as subcells demonstrate efficiencies of 27.17% and 28.31% for two‐terminal and four‐terminal tandems, respectively, presenting a straightforward approach to optimizing performance in Sn‐Pb mixed PSCs and their tandems. [ABSTRACT FROM AUTHOR]

Published
2024
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