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dc.contributor.authorNiu, Tianqi
dc.contributor.authorLu, Jing
dc.contributor.authorJia, Xuguang
dc.contributor.authorXu, Zhuo
dc.contributor.authorTang, Ming-Chun
dc.contributor.authorBarrit, Dounya
dc.contributor.authorYuan, Ningyi
dc.contributor.authorDing, Jianning
dc.contributor.authorZhang, Xu
dc.contributor.authorFan, Yuanyuan
dc.contributor.authorLuo, Tao
dc.contributor.authorZhang, Yalan
dc.contributor.authorSmilgies, Detlef-M.
dc.contributor.authorLiu, Zhike
dc.contributor.authorAmassian, Aram
dc.contributor.authorJin, Shengye
dc.contributor.authorZhao, Kui
dc.contributor.authorLiu, Shengzhong (Frank)
dc.date.accessioned2019-10-01T11:43:46Z
dc.date.available2019-10-01T11:43:46Z
dc.date.issued2019-09-11
dc.identifier.citationNiu, T., Lu, J., Jia, X., Xu, Z., Tang, M.-C., Barrit, D., … Liu, S. (2019). Interfacial Engineering at the 2D/3D Heterojunction for High-Performance Perovskite Solar Cells. Nano Letters, 19(10), 7181–7190. doi:10.1021/acs.nanolett.9b02781
dc.identifier.doi10.1021/acs.nanolett.9b02781
dc.identifier.urihttp://hdl.handle.net/10754/656814
dc.description.abstractPerovskite solar cells based on two-dimensional/three-dimensional (2D/3D) hierarchical structure have attracted significant attention in recent years due to their promising photovoltaic performance and stability. However, obtaining a detailed understanding of interfacial mechanism at the 2D/3D heterojunction, for example, the ligand-chemistry-dependent nature of the 2D/3D heterojunction and its influence on charge collection and the final photovoltaic outcome, is not yet fully developed. Here we demonstrate the underlying 3D phase templates growth of quantum wells (QWs) within a 2D capping layer, which is further influenced by the fluorination of spacers and compositional engineering in terms of thickness distribution and orientation. Better QW alignment and faster dynamics of charge transfer at the 2D/3D heterojunction result in higher charge mobility and lower charge recombination loss, largely explaining the significant improvements in charge collection and open-circuit voltage (VOC) in complete solar cells. As a result, 2D/3D solar cells with a power-conversion efficiency of 21.15% were achieved, significantly higher than the 3D counterpart (19.02%). This work provides key missing information on how interfacial engineering influences the desirable electronic properties of the 2D/3D hierarchical films and device performance via ligand chemistry and compositional engineering in the QW layer.
dc.description.sponsorshipThis work was supported by the National Key Research and Development Program of China (2017YFA0204800, 2016YFA0202403), Key projects of the Natural Science Foundation of China (51933010), National Natural Science Foundation of China (61974085, 61604092), Natural Science Basic Research Plan in Shaanxi Province of China (program no. 2017JQ6040), the 111 Project (B14041), the National 1000 Talents Plan program (1110010341), and the King Abdullah University for Science and Technology (KAUST). CHESS is supported by the NSF award DMR-1332208.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/10.1021/acs.nanolett.9b02781
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/10.1021/acs.nanolett.9b02781.
dc.subjectPerovskite solar cell
dc.subject2D/3D heterojunction
dc.subjectligand chemistry
dc.subjectinterfacial mechanism
dc.subjecthigh performance
dc.titleInterfacial Engineering at the 2D/3D Heterojunction for High-Performance Perovskite Solar Cells.
dc.typeArticle
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentOffice of the VP
dc.contributor.departmentOrganic Electronics and Photovoltaics Group
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalNano letters
dc.rights.embargodate2020-09-04
dc.eprint.versionPost-print
dc.contributor.institutionKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering , Shaanxi Normal University , Xi'an 710119 , China.
dc.contributor.institutionSchool of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology , Changzhou University , Changzhou 213164 , Jiangsu , China.
dc.contributor.institutionCornell High Energy Synchrotron Source , Cornell University , Ithaca , New York 14850 , United States.
dc.contributor.institutionDalian National Laboratory for Clean Energy, iChEM , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023 , China.
kaust.personTang, Ming-Chun
kaust.personBarrit, Dounya
kaust.personAmassian, Aram


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