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dc.contributor.authorZhang, Xu
dc.contributor.authorRen, Xiaodong
dc.contributor.authorLiu, Bin
dc.contributor.authorMunir, Rahim
dc.contributor.authorZhu, Xuejie
dc.contributor.authorYang, Dong
dc.contributor.authorLi, Jianbo
dc.contributor.authorLiu, Yucheng
dc.contributor.authorSmilgies, Detlef-M.
dc.contributor.authorLi, Ruipeng
dc.contributor.authorYang, Zhou
dc.contributor.authorNiu, Tianqi
dc.contributor.authorWang, Xiuli
dc.contributor.authorAmassian, Aram
dc.contributor.authorZhao, Kui
dc.contributor.authorLiu, Shengzhong (Frank)
dc.date.accessioned2018-01-01T12:19:04Z
dc.date.available2018-01-01T12:19:04Z
dc.date.issued2017
dc.identifier.citationZhang X, Ren X, Liu B, Munir R, Zhu X, et al. (2017) Stable high efficiency two-dimensional perovskite solar cells via cesium doping. Energy & Environmental Science 10: 2095–2102. Available: http://dx.doi.org/10.1039/c7ee01145h.
dc.identifier.issn1754-5692
dc.identifier.issn1754-5706
dc.identifier.doi10.1039/c7ee01145h
dc.identifier.urihttp://hdl.handle.net/10754/626632
dc.description.abstractTwo-dimensional (2D) organic-inorganic perovskites have recently emerged as one of the most important thin-film solar cell materials owing to their excellent environmental stability. The remaining major pitfall is their relatively poor photovoltaic performance in contrast to 3D perovskites. In this work we demonstrate cesium cation (Cs) doped 2D (BA)(MA)PbI perovskite solar cells giving a power conversion efficiency (PCE) as high as 13.7%, the highest among the reported 2D devices, with excellent humidity resistance. The enhanced efficiency from 12.3% (without Cs) to 13.7% (with 5% Cs) is attributed to perfectly controlled crystal orientation, an increased grain size of the 2D planes, superior surface quality, reduced trap-state density, enhanced charge-carrier mobility and charge-transfer kinetics. Surprisingly, it is found that the Cs doping yields superior stability for the 2D perovskite solar cells when subjected to a high humidity environment without encapsulation. The device doped using 5% Cs degrades only ca. 10% after 1400 hours of exposure in 30% relative humidity (RH), and exhibits significantly improved stability under heating and high moisture environments. Our results provide an important step toward air-stable and fully printable low dimensional perovskites as a next-generation renewable energy source.
dc.description.sponsorshipThis work was supported by the National Key Research project MOST (2016YFA0202400), the National Natural Science Foundation of China (61604092 and 61674098), the National University Research Fund (Grant No. GK261001009, GK201603107), the 111 Project (B14041), and the Chinese National 1000-talent-plan program (1110010341). CHESS is supported by the NSF award DMR-1332208.
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2017/EE/C7EE01145H#!divAbstract
dc.titleStable high efficiency two-dimensional perovskite solar cells via cesium doping
dc.typeArticle
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentOrganic Electronics and Photovoltaics Group
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalEnergy Environ. Sci.
dc.contributor.institutionUniversity of Chinese Academy of Sciences, Beijing, 100049, China
dc.contributor.institutionKey Laboratory of Applied Surface and Colloid Chemistry, National 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.institutionDalian National Laboratory for Clean Energy, IChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, , China
dc.contributor.institutionCornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY, 14853, United States
kaust.personMunir, Rahim
kaust.personAmassian, Aram


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