Xin Jiang, Shucheng Qin, Lei Meng, Guorui He, Jinyuan Zhang, Yiyang Wang, Yiqiao Zhu, Tianwei Zou, Yufei Gong, Zekun Chen, Guangpei Sun, Minchao Liu, Xiaojun Li, Felix Lang, Yongfang Li
{"title":"Isomeric diammonium passivation for perovskite–organic tandem solar cells","authors":"Xin Jiang, Shucheng Qin, Lei Meng, Guorui He, Jinyuan Zhang, Yiyang Wang, Yiqiao Zhu, Tianwei Zou, Yufei Gong, Zekun Chen, Guangpei Sun, Minchao Liu, Xiaojun Li, Felix Lang, Yongfang Li","doi":"10.1038/s41586-024-08160-y","DOIUrl":null,"url":null,"abstract":"<p>In recent years, perovskite has been widely adopted in series-connected monolithic tandem solar cells (TSCs) to overcome the Shockley–Queisser limit of single-junction solar cells. Perovskite/organic TSCs, comprising a wide-bandgap (WBG) perovskite solar cell (pero-SC) as the front cell and a narrow-bandgap organic solar cell (OSC) as the rear cell, have recently drawn attention owing to the good stability and potential high power conversion efficiency (PCE)<sup>1,2,3,4</sup>. However, WBG pero-SCs usually exhibit higher voltage losses than regular pero-SCs, which limits the performance of TSCs<sup>5,6</sup>. One of the major obstacles comes from interfacial recombination at the perovskite/C<sub>60</sub> interface, and it is important to develop effective surface passivation strategies to pursue higher PCE of perovskite/organic TSCs<sup>7</sup>. Here we exploit a new surface passivator cyclohexane 1,4-diammonium diiodide (CyDAI<sub>2</sub>), which naturally contains two isomeric structures with ammonium groups on the same or opposite sides of the hexane ring (denoted as <i>cis</i>-CyDAI<sub>2</sub> and <i>trans</i>-CyDAI<sub>2</sub>, respectively), and the two isomers demonstrate completely different surface interaction behaviors. The <i>cis</i>-CyDAI<sub>2</sub> passivation treatment reduces the Quasi–Fermi level splitting (QFLS)–open circuit voltage (<i>V</i><sub>oc</sub>) mismatch of the WBG pero-SCs with a bandgap of 1.88 eV and enhanced its <i>V</i><sub>oc</sub> to 1.36 V. Combining the <i>cis</i>-CyDAI<sub>2</sub> treated perovskite and the organic active layer with a narrow-bandgap of 1.24 eV, the constructed monolithic perovskite/organic TSC demonstrates a PCE of 26.4% (certified as 25.7%).</p>","PeriodicalId":18787,"journal":{"name":"Nature","volume":null,"pages":null},"PeriodicalIF":50.5000,"publicationDate":"2024-10-14","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/s41586-024-08160-y","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
In recent years, perovskite has been widely adopted in series-connected monolithic tandem solar cells (TSCs) to overcome the Shockley–Queisser limit of single-junction solar cells. Perovskite/organic TSCs, comprising a wide-bandgap (WBG) perovskite solar cell (pero-SC) as the front cell and a narrow-bandgap organic solar cell (OSC) as the rear cell, have recently drawn attention owing to the good stability and potential high power conversion efficiency (PCE)1,2,3,4. However, WBG pero-SCs usually exhibit higher voltage losses than regular pero-SCs, which limits the performance of TSCs5,6. One of the major obstacles comes from interfacial recombination at the perovskite/C60 interface, and it is important to develop effective surface passivation strategies to pursue higher PCE of perovskite/organic TSCs7. Here we exploit a new surface passivator cyclohexane 1,4-diammonium diiodide (CyDAI2), which naturally contains two isomeric structures with ammonium groups on the same or opposite sides of the hexane ring (denoted as cis-CyDAI2 and trans-CyDAI2, respectively), and the two isomers demonstrate completely different surface interaction behaviors. The cis-CyDAI2 passivation treatment reduces the Quasi–Fermi level splitting (QFLS)–open circuit voltage (Voc) mismatch of the WBG pero-SCs with a bandgap of 1.88 eV and enhanced its Voc to 1.36 V. Combining the cis-CyDAI2 treated perovskite and the organic active layer with a narrow-bandgap of 1.24 eV, the constructed monolithic perovskite/organic TSC demonstrates a PCE of 26.4% (certified as 25.7%).
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.