Saisai Li, Yuanzhi Jiang, Jian Xu, Di Wang, Zijin Ding, Tong Zhu, Bin Chen, Yingguo Yang, Mingyang Wei, Renjun Guo, Yi Hou, Yu Chen, Changjiu Sun, Keyu Wei, Saif M. H. Qaid, Haizhou Lu, Hairen Tan, Dawei Di, Jun Chen, Michael Grätzel, Edward H. Sargent, Mingjian Yuan
{"title":"High-efficiency and thermally stable FACsPbI3 perovskite photovoltaics","authors":"Saisai Li, Yuanzhi Jiang, Jian Xu, Di Wang, Zijin Ding, Tong Zhu, Bin Chen, Yingguo Yang, Mingyang Wei, Renjun Guo, Yi Hou, Yu Chen, Changjiu Sun, Keyu Wei, Saif M. H. Qaid, Haizhou Lu, Hairen Tan, Dawei Di, Jun Chen, Michael Grätzel, Edward H. Sargent, Mingjian Yuan","doi":"10.1038/s41586-024-08103-7","DOIUrl":null,"url":null,"abstract":"<p><i>α</i>-FA<sub>1-<i>x</i></sub>Cs<sub><i>x</i></sub>PbI<sub>3</sub> is a promising absorber material for efficient and stable perovskite solar cells (PSCs)<sup>1,2</sup>. However, the most efficient <i>α</i>-FA<sub>1-<i>x</i></sub>Cs<sub><i>x</i></sub>PbI<sub>3</sub> PSCs require the inclusion of methylammonium chloride (MACl) additive<sup>3,4</sup>, which generates volatile organic residues (i.e., MA) that limit device stability at elevated temperatures<sup>5</sup>. To date, the highest certified power-conversion efficiency (PCE) of <i>α</i>-FA<sub>1-<i>x</i></sub>Cs<sub><i>x</i></sub>PbI<sub>3</sub> PSCs without MACl was only ~24% (ref.<sup>6,7</sup>), and has yet to exhibit any stability advantages. Here, we identify interfacial contact loss caused by the Cs<sup>+</sup> accumulation for the conventional <i>α</i>-FA<sub>1-<i>x</i></sub>Cs<sub><i>x</i></sub>PbI<sub>3</sub> PSCs, which deteriorates the device performance and stability. Through <i>in-situ</i> GIWAXS analysis and DFT calculations, we demonstrate an intermediate phase-assisted crystallization pathway enabled by acetate surface coordination to fabricate high-quality <i>α</i>-FA<sub>1-<i>x</i></sub>Cs<sub><i>x</i></sub>PbI<sub>3</sub> film, without using MA-additive. We herein report a certified stabilized power output (SPO) efficiency of 25.94% and a reverse-scanning PCE of 26.64% for <i>α</i>-FA<sub>1-<i>x</i></sub>Cs<sub><i>x</i></sub>PbI<sub>3</sub> PSCs, exhibiting negligible contact losses and enhanced operational stability. The devices retain >95% of their initial PCEs after over 2,000 hours operating at maximum power point under 1 sun, 85 °C, and 60% relative humidity (ISOS-L-3).</p>","PeriodicalId":18787,"journal":{"name":"Nature","volume":null,"pages":null},"PeriodicalIF":50.5000,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1038/s41586-024-08103-7","RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
α-FA1-xCsxPbI3 is a promising absorber material for efficient and stable perovskite solar cells (PSCs)1,2. However, the most efficient α-FA1-xCsxPbI3 PSCs require the inclusion of methylammonium chloride (MACl) additive3,4, which generates volatile organic residues (i.e., MA) that limit device stability at elevated temperatures5. To date, the highest certified power-conversion efficiency (PCE) of α-FA1-xCsxPbI3 PSCs without MACl was only ~24% (ref.6,7), and has yet to exhibit any stability advantages. Here, we identify interfacial contact loss caused by the Cs+ accumulation for the conventional α-FA1-xCsxPbI3 PSCs, which deteriorates the device performance and stability. Through in-situ GIWAXS analysis and DFT calculations, we demonstrate an intermediate phase-assisted crystallization pathway enabled by acetate surface coordination to fabricate high-quality α-FA1-xCsxPbI3 film, without using MA-additive. We herein report a certified stabilized power output (SPO) efficiency of 25.94% and a reverse-scanning PCE of 26.64% for α-FA1-xCsxPbI3 PSCs, exhibiting negligible contact losses and enhanced operational stability. The devices retain >95% of their initial PCEs after over 2,000 hours operating at maximum power point under 1 sun, 85 °C, and 60% relative humidity (ISOS-L-3).
期刊介绍:
Nature is a prestigious international journal that publishes peer-reviewed research in various scientific and technological fields. The selection of articles is based on criteria such as originality, importance, interdisciplinary relevance, timeliness, accessibility, elegance, and surprising conclusions. In addition to showcasing significant scientific advances, Nature delivers rapid, authoritative, insightful news, and interpretation of current and upcoming trends impacting science, scientists, and the broader public. The journal serves a dual purpose: firstly, to promptly share noteworthy scientific advances and foster discussions among scientists, and secondly, to ensure the swift dissemination of scientific results globally, emphasizing their significance for knowledge, culture, and daily life.