{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361699994084004864.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/adma.201908205"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fadma.201908205"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/adma.201908205"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/adma.201908205"}},{"identifier":{"@type":"URI","@value":"https://advanced.onlinelibrary.wiley.com/doi/pdf/10.1002/adma.201908205"}}],"dc:title":[{"@value":"Single‐Junction Organic Photovoltaic Cells with Approaching 18% Efficiency"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Optimizing the molecular structures of organic photovoltaic (OPV) materials is one of the most effective methods to boost power conversion efficiencies (PCEs). For an excellent molecular system with a certain conjugated skeleton, fine tuning the alky chains is of considerable significance to fully explore its photovoltaic potential. In this work, the optimization of alkyl chains is performed on a chlorinated nonfullerene acceptor (NFA) named BTP‐4Cl‐BO (a Y6 derivative) and very impressive photovoltaic parameters in OPV cells are obtained. To get more ordered intermolecular packing, the <jats:italic>n</jats:italic>‐undecyl is shortened at the edge of BTP‐eC11 to <jats:italic>n</jats:italic>‐nonyl and <jats:italic>n</jats:italic>‐heptyl. As a result, the NFAs of BTP‐eC9 and BTP‐eC7 are synthesized. The BTP‐eC7 shows relatively poor solubility and thus limits its application in device fabrication. Fortunately, the BTP‐eC9 possesses good solubility and, at the same time, enhanced electron transport property than BTP‐eC11. Significantly, due to the simultaneously enhanced short‐circuit current density and fill factor, the BTP‐eC9‐based single‐junction OPV cells record a maximum PCE of 17.8% and get a certified value of 17.3%. These results demonstrate that minimizing the alkyl chains to get suitable solubility and enhanced intermolecular packing has a great potential in further improving its photovoltaic performance.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381699994084004870","@type":"Researcher","foaf:name":[{"@value":"Yong Cui"}],"jpcoar:affiliationName":[{"@value":"State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences  Beijing 100190 China"},{"@value":"University of Chinese Academy of Sciences  Beijing 100049 China"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004876","@type":"Researcher","foaf:name":[{"@value":"Huifeng Yao"}],"jpcoar:affiliationName":[{"@value":"State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences  Beijing 100190 China"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004873","@type":"Researcher","foaf:name":[{"@value":"Jianqi Zhang"}],"jpcoar:affiliationName":[{"@value":"CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology  Beijing 100190 China"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004867","@type":"Researcher","foaf:name":[{"@value":"Kaihu Xian"}],"jpcoar:affiliationName":[{"@value":"State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences  Beijing 100190 China"},{"@value":"University of Chinese Academy of Sciences  Beijing 100049 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Wang"}],"jpcoar:affiliationName":[{"@value":"State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences  Beijing 100190 China"},{"@value":"Department of Physics Chemistry and Biology Linköping University  Linköping Sweden"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004875","@type":"Researcher","foaf:name":[{"@value":"Ye Xu"}],"jpcoar:affiliationName":[{"@value":"State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences  Beijing 100190 China"},{"@value":"University of Chinese Academy of Sciences  Beijing 100049 China"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004864","@type":"Researcher","foaf:name":[{"@value":"Kangqiao Ma"}],"jpcoar:affiliationName":[{"@value":"State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences  Beijing 100190 China"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004865","@type":"Researcher","foaf:name":[{"@value":"Cunbin An"}],"jpcoar:affiliationName":[{"@value":"State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences  Beijing 100190 China"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004868","@type":"Researcher","foaf:name":[{"@value":"Chang He"}],"jpcoar:affiliationName":[{"@value":"State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences  Beijing 100190 China"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004866","@type":"Researcher","foaf:name":[{"@value":"Zhixiang Wei"}],"jpcoar:affiliationName":[{"@value":"University of Chinese Academy of Sciences  Beijing 100049 China"},{"@value":"CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology  Beijing 100190 China"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004874","@type":"Researcher","foaf:name":[{"@value":"Feng Gao"}],"jpcoar:affiliationName":[{"@value":"Department of Physics Chemistry and Biology Linköping University  Linköping Sweden"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994084004992","@type":"Researcher","foaf:name":[{"@value":"Jianhui Hou"}],"jpcoar:affiliationName":[{"@value":"State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences 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