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dc.contributor.authorQiao, Hong Wei
dc.contributor.authorYang, Shuang
dc.contributor.authorWang, Yun
dc.contributor.authorChen, Xiao
dc.contributor.authorWen, Tian Yu
dc.contributor.authorTang, Li Juan
dc.contributor.authorCheng, Qilin
dc.contributor.authorHou, Yu
dc.contributor.authorZhao, Huijun
dc.contributor.authorYang, Hua Gui
dc.date.accessioned2019-07-04T12:34:17Z
dc.date.available2019-07-04T12:34:17Z
dc.date.issued2019
dc.identifier.issn0935-9648
dc.identifier.doi10.1002/adma.201804217
dc.identifier.urihttp://hdl.handle.net/10072/383024
dc.description.abstractA gradient heterosturcture is one of the basic methods to control the charge flow in perovskite solar cells (PSCs). However, a classical route for gradient heterosturctures is based on the diffusion technique, in which the guest ions gradually diffuse into the films from a concentrated source of dopants. The gradient heterosturcture is only accessible to the top side, and may be time consuming and costly. Here, the “intolerant” n‐type heteroatoms (Sb3+, In3+) with mismatched cation sizes and charge states can spontaneously enrich two sides of perovskite thin films. The dopants at specific sides can be extracted by a typical hole‐transport layer. Theoretical calculations and experimental observations both indicate that the optimized charge management can be attributed to the tailored band structure and interfacial electronic hybridization, which promote charge separation and collection. The strategy enables the fabrication of PSCs with a spontaneous graded heterojunction showing high efficiency. A champion device based on Sb3+ doped film shows a stabilized power‐conversion efficiency of 21.04% with a high fill factor of 0.84 and small hysteresis.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherWILEY-V C H VERLAG GMBH
dc.relation.ispartofissue5
dc.relation.ispartofjournalADVANCED MATERIALS
dc.relation.ispartofvolume31
dc.subject.fieldofresearchPhysical Sciences
dc.subject.fieldofresearchChemical Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode02
dc.subject.fieldofresearchcode03
dc.subject.fieldofresearchcode09
dc.titleA Gradient Heterostructure Based on Tolerance Factor in High-Performance Perovskite Solar Cells with 0.84 Fill Factor
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorWang, Yun
gro.griffith.authorZhao, Huijun


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