Non-selective adsorption of organic cations enables conformal surface capping of perovskite grains for stabilized photovoltaic operation

Ziren Zhou; Hui Jun Lian; Jin Xie; Wen Cheng Qiao; Xue Feng Wu; Yiheng Shi; Xue Lu Wang; Sheng Dai; Haiyang Yuan; Yu Hou; Shuang Yang; Hua Gui Yang

Cell Reports Physical Science (Feb 2022)

Non-selective adsorption of organic cations enables conformal surface capping of perovskite grains for stabilized photovoltaic operation

Ziren Zhou,
Hui Jun Lian,
Jin Xie,
Wen Cheng Qiao,
Xue Feng Wu,
Yiheng Shi,
Xue Lu Wang,
Sheng Dai,
Haiyang Yuan,
Yu Hou,
Shuang Yang,
Hua Gui Yang

Affiliations

Ziren Zhou: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Hui Jun Lian: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Jin Xie: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Wen Cheng Qiao: Department & Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
Xue Feng Wu: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Yiheng Shi: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Xue Lu Wang: Department & Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
Sheng Dai: Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
Haiyang Yuan: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Yu Hou: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China; School of Mathematics, East China University of Science and Technology, Shanghai 200237, China; Shenzhen Research Institute of East China University of Science and Technology, Shenzhen 518057, China; Corresponding author
Shuang Yang: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China; Corresponding author
Hua Gui Yang: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

Journal volume & issue: Vol. 3, no. 2
p. 100760

Abstract

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Summary: Chemical passivation of defective perovskite surface is a fundamental strategy to stabilize solar cell operation by impeding the defect-dominant surface ion migration. Here, we show that the configuration of organic cations plays a key role in determining their surface adsorption energetics at various perovskite facets, which will strongly impact the spatial uniformity of the low-dimensional perovskite passivation layer (LDPL). A weak-anisotropic adsorption behavior is demonstrated for tertiary ammonium that can enable a conformal LDPL on the perovskite grain surface. Benefiting from comprehensive surface passivation, the migration of ionic perovskite species was suppressed and the as-fabricated p-i-n solar cells yielded an optimized power conversion efficiency of 22.6% with an expected T80 lifetime of about 4,000 h under continuous 1-sun illumination. Our findings give insight into the design and preparation of heterostructured perovskite films toward efficient and stable solar cells.

Published in Cell Reports Physical Science

ISSN: 2666-3864 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science: Physics
Website: https://www.cell.com/cell-reports-physical-science

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