Multifunctional Modification of the Buried Interface in Mixed Tin‐Lead Perovskite Solar Cells

Abstract Mixed tin‐lead perovskite solar cells can reach band gaps as low as 1.2 eV, offering high theoretical efficiency and serving as base materials for all‐perovskite tandem solar cells. However, instability and high defect densities at the interfaces, particularly the buried surface, have limited performance improvements. In this work, we present the modification of the bottom perovskite interface with multifunctional hydroxylamine salts. These salts can effectively coordinate the different perovskite components, having critical influences in regulating the crystallization process and passivating defects of varying nature. The surface modification reduced traps at the interface and prevented the formation of excessive lead iodide, enhancing the quality of the films. The modified devices presented fill factors reaching 81 % and efficiencies of up to 23.8 %. The unencapsulated modified devices maintained over 95 % of their initial efficiency after 2000 h of shelf storage.

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Publication Details

Journal
Angewandte Chemie
Published
2024-08-05
DOI
https://doi.org/10.1002/ange.202409330
Citations
6
Primary Topic
Perovskite Materials and Applications
Type
article
Field-Weighted Citation Impact
1.25

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article

Multifunctional Modification of the Buried Interface in Mixed Tin‐Lead Perovskite Solar Cells

Zhenhuang Su, Rui Zhu, Antonio Abate, Guixiang Li et al.
6 citations
Angewandte Chemie
Perovskite Materials and Applications
1.25
article

Multifunctional Modification of the Buried Interface in Mixed Tin‐Lead Perovskite Solar Cells

Zhenhuang Su, Rui Zhu, Antonio Abate, Guixiang Li, Jorge Pascual, Meng Ke Li, Xingyu Gao, Junhan Zhang, Zhihao Li, Xinru Sun, Hongzhuo Wu
article en
6 citations

Abstract

Abstract Mixed tin‐lead perovskite solar cells can reach band gaps as low as 1.2 eV, offering high theoretical efficiency and serving as base materials for all‐perovskite tandem solar cells. However, instability and high defect densities at the interfaces, particularly the buried surface, have limited performance improvements. In this work, we present the modification of the bottom perovskite interface with multifunctional hydroxylamine salts. These salts can effectively coordinate the different perovskite components, having critical influences in regulating the crystallization process and passivating defects of varying nature. The surface modification reduced traps at the interface and prevented the formation of excessive lead iodide, enhancing the quality of the films. The modified devices presented fill factors reaching 81 % and efficiencies of up to 23.8 %. The unencapsulated modified devices maintained over 95 % of their initial efficiency after 2000 h of shelf storage.

Angewandte ChemieVol. 136(48)
University of the Basque Country (ES), Henan University (CN), Helmholtz-Zentrum Berlin für Materialien und Energie (DE), Polymat (ES), Ministry of Education (IR), Shanghai Advanced Research Institute (CN), Helmholtz-Zentrum Hereon (DE), Shanghai Synchrotron Radiation Facility
China Postdoctoral Science Foundation, Henan Provincial Science and Technology Research Project
Affordable and clean energy
Openalex Percentile: Top 20%
Perovskite Materials and Applications
1.25
DOISourceOpenAlex
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