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dc.contributor.authorHou, Yu
dc.contributor.authorChen, Xiao
dc.contributor.authorYang, Shuang
dc.contributor.authorLi, Chunzhong
dc.contributor.authorZhao, Huijun
dc.contributor.authorYang, Hua Gui
dc.date.accessioned2017-08-15T01:53:58Z
dc.date.available2017-08-15T01:53:58Z
dc.date.issued2017
dc.identifier.issn1616-301X
dc.identifier.doi10.1002/adfm.201700878
dc.identifier.urihttp://hdl.handle.net/10072/344136
dc.description.abstractAs the key component in efficient perovskite solar cells, the electron transport layer (ETL) can selectively collect photogenerated charge carriers produced in perovskite absorbers and prevent the recombination of carriers at interfaces, thus ensuring a high power conversion efficiency. Compared with the conventional single- or dual-layered ETLs, a gradient heterojunction (GHJ) strategy is more attractive to facilitate charge separation because the potential gradient created at an appropriately structured heterojunction can act as a driving force to regulate the electron transport toward a desired direction. Here, a SnO2/TiO2 GHJ interlayer configuration inside the ETL is reported to simultaneously achieve effective extraction and efficient transport of photoelectrons. With such an interlayer configuration, the GHJs formed at the perovskite/ETL interface act collectively to extract photogenerated electrons from the perovskite layer, while GHJs formed at the boundaries of the interconnected SnO2 and TiO2 networks throughout the entire ETL layer can extract electron from the slow electron mobility TiO2 network to the high electron mobility SnO2 network. Devices based on GHJ ETL exhibit a champion power conversion efficiency of 18.08%, which is significantly higher than that obtained from the compact TiO2 ETL constructed under the comparable conditions.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherWiley- VCH Verlag GmbH & Co. KGaA
dc.relation.ispartofpagefrom1700878-1
dc.relation.ispartofpageto1700878-7
dc.relation.ispartofissue27
dc.relation.ispartofjournalAdvanced Electronic Materials
dc.relation.ispartofvolume27
dc.subject.fieldofresearchMaterials Engineering not elsewhere classified
dc.subject.fieldofresearchPhysical Sciences
dc.subject.fieldofresearchChemical Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode091299
dc.subject.fieldofresearchcode02
dc.subject.fieldofresearchcode03
dc.subject.fieldofresearchcode09
dc.titleA Band-Edge Potential Gradient Heterostructure to Enhance Electron Extraction Efficiency of the Electron Transport Layer in High-Performance Perovskite Solar Cells
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.hasfulltextNo Full Text
gro.griffith.authorZhao, Huijun
gro.griffith.authorYang, Huagui
gro.griffith.authorHou, Yu


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