Molecular Bridge Assisted Bifacial Defect Healing Enables Low Energy Loss for Efficient and Stable Perovskite Solar Cells

Jidong Deng; Huifeng Zhang; Kun WeiYuanhui XiaoCuiping ZhangLi YangXiaoli ZhangDeyin WuYe YangJinbao Zhang

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Molecular Bridge Assisted Bifacial Defect Healing Enables Low Energy Loss for Efficient and Stable Perovskite Solar Cells

机译：Molecular Bridge Assisted Bifacial Defect Healing Enables Low Energy Loss for Efficient and Stable Perovskite Solar Cells

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Interface engineering is of paramount importance for optimizing carrierdynamics and stability of perovskite solar cells (PSCs), but little attentionhas been paid to understanding and managing the buried interfaces. Here,a molecular bridge strategy is developed to modify the properties of buriedinterfaces in n–i–p PSCs by introducing a multi-functional additive 2-Hydroxyethyltrimethylammonium chloride (ChCl) in the bottom SnO_2 electrontransport layer. The ChCl treatment enables bifacial defects passivation andimproved perovskite quality, leading to notably enhanced electron extractionand suppressed non-radiative recombination at the buried interfaces. As aresult, a significantly improved power conversion efficiency (PCE) from 20.0to 23.07 with a remarkable open-circuit voltage (V_(oc)) of up to 1.193 V isachieved, along with superior stability (up to 4000 h) for the unsealed devicesunder different conditions (moisture, heat and maximum power point). Furthermore,this molecular bridge strategy demonstrates the ability to releasethe stress in perovskite thin film and simultaneously strengthen the interfacialtoughness in flexible PSCs, yielding remarkable mechanical stability and achampion PCE of 21.50. This study offers deep insights into understandingand engineering the buried interfaces and provides effective strategies tofurther enhance the performance and stability of PSCs.

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来源
《Advanced functional materials》 |2022年第51期|2209516.1-2209516.11|共11页
作者
Jidong Deng; Huifeng Zhang; Kun WeiYuanhui XiaoCuiping ZhangLi YangXiaoli ZhangDeyin WuYe YangJinbao Zhang;
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作者单位

College of MaterialsFujian Key Laboratory of Advanced MaterialsXiamen Key Laboratory of Electronic Ceramic Materials and DevicesXiamen UniversityXiamen 361005, China;

Shenzhen Research Institute of Xiamen UniversityShenzhen 518000, China;

Innovation Laborat;

College of MaterialsFujian Key Laboratory of Advanced MaterialsXiamen Key Laboratory of Electronic Ceramic Materials and DevicesXiamen UniversityXiamen 361005, China;

State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005, ChinaState Key Laboratory of Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005, ChinaShenzhen Research Institute of Xiamen UniversityShenzhen 518000, ChinaSchool of Physics & Optoelectronic EngineeringGuangdong University of TechnologyGuangzhou 510006, ChinaCollege of MaterialsFujian Key Laboratory of Advanced MaterialsXiamen Key Laboratory of Electronic Ceramic Materials and DevicesXiamen UniversityXiamen 361005, China;

State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chem;

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正文语种英语
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buried interfaces; energy losses; molecular bridge strategies; perovskitesolar cells; stability;

Molecular Bridge Assisted Bifacial Defect Healing Enables Low Energy Loss for Efficient and Stable Perovskite Solar Cells

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