Multi-functional molecule advancing the efficiency of pure 3D FASnI<sub>3</sub> perovskite solar cells based on the tin tetraiodide reduction method

Li, Hao; Shi, Haoyu; Tan, Qin; Chen, Guocong; Wang, Jiafeng; Ma, Guoqiang; He, Dong; Cheng, Tianle; Gao, Han; Lamberti, Francesco; He, Zhubing

doi:10.1039/d4ta01783h

J. Mater. Chem. A

2024

DOI: 10.1039/d4ta01783h

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Multi-functional molecule advancing the efficiency of pure 3D FASnI₃ perovskite solar cells based on the tin tetraiodide reduction method

Hao Li,

Haoyu Shi,

Qin Tan

et al.

Abstract: Tin halide perovskite solar cells (PSCs) show promise as lead-free photovoltaic alternatives, but face challenges due to Sn2+ oxidation and crystallization control issues. We introduce a novel method to enhance...

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Synergistic Passivation of Buried Interface and Grain Boundary of Tin–Lead Mixed Perovskite Films for Efficient Solar Cells

He,

Liu,

et al. 2024

Adv Funct Materials

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Due to its extreme susceptibility of tin to oxidation, the power conversion efficiency (PCE) of tin–lead mixed perovskite (TLP) solar cells still lags far behind the pure lead halides perovskite solar cells (PSCs). More than the endeavors of the suppression of tin‐oxidation in the bulk TLP films, the synergistic interface engineering of both grain boundaries and interfaces turns more and more important. Here, a synergistic co‐passivation strategy is reported by modulating poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) substrate with p‐guanidinobenzonitrile hydrochloride (CG) and grain boundary passivation of TLP film with 3‐cyano‐4‐hydrazinylbenzoic acid (3C‐HBA), realizing a competitive device PCE of 23.3%, positioning it at the forefront of reported literature. Strikingly, the discovery of CG modifications for such important PEDOT:PSS layer. Moreover, relying on the comprehensive spectroscopies, 3C‐HBA is revealed to effectively modulate the crystallization process of TLP films. This co‐passivation strategy obviously reduces trap density and suppresses Sn2+ oxidation of TLP devices.

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Synergistic Passivation of Buried Interface and Grain Boundary of Tin–Lead Mixed Perovskite Films for Efficient Solar Cells

He,

Liu,

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

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Multi-functional molecule advancing the efficiency of pure 3D FASnI₃ perovskite solar cells based on the tin tetraiodide reduction method

Abstract: Tin halide perovskite solar cells (PSCs) show promise as lead-free photovoltaic alternatives, but face challenges due to Sn2+ oxidation and crystallization control issues. We introduce a novel method to enhance...

Cited by 1 publication

References 51 publications

Synergistic Passivation of Buried Interface and Grain Boundary of Tin–Lead Mixed Perovskite Films for Efficient Solar Cells

Synergistic Passivation of Buried Interface and Grain Boundary of Tin–Lead Mixed Perovskite Films for Efficient Solar Cells

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Multi-functional molecule advancing the efficiency of pure 3D FASnI3 perovskite solar cells based on the tin tetraiodide reduction method

Abstract: Tin halide perovskite solar cells (PSCs) show promise as lead-free photovoltaic alternatives, but face challenges due to Sn2+ oxidation and crystallization control issues. We introduce a novel method to enhance...

Cited by 1 publication

References 51 publications

Synergistic Passivation of Buried Interface and Grain Boundary of Tin–Lead Mixed Perovskite Films for Efficient Solar Cells

Synergistic Passivation of Buried Interface and Grain Boundary of Tin–Lead Mixed Perovskite Films for Efficient Solar Cells

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Product

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Multi-functional molecule advancing the efficiency of pure 3D FASnI₃ perovskite solar cells based on the tin tetraiodide reduction method