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Article: Unraveling the Crystallization Kinetics of 2D Perovskites with Sandwich‐Type Structure for High‐Performance Photovoltaics

TitleUnraveling the Crystallization Kinetics of 2D Perovskites with Sandwich‐Type Structure for High‐Performance Photovoltaics
Authors
Keywords2D perovskites
crystallization kinetics
in situ GIWAXS
sandwich‐type structures
Issue Date2020
PublisherWiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2089
Citation
Advanced Materials, 2020, v. 32 n. 36, p. article no. 2002784 How to Cite?
Abstract2D perovskite solar cells with high stability and high efficiency have attracted significant attention. A systematical static and dynamic structure investigation is carried out to show the details of 2D morphology evolution. A dual additive approach is used, where the synergy between an alkali metal cation and a polar solvent leads to high‐quality 2D perovskite films with sandwich‐type structures and vertical phase segregation. Such novel structure can induce high‐quality 2D slab growth and reduce internal and surface defects, resulting in a high device efficiency of 16.48% with enhanced continuous illumination stability and improved moisture (55–60%) and thermal (85 °C) tolerances. Transient absorption spectra reveal the carrier migration from low n to high n species with different kinetics. An [PbI6]4− octagon coalescence transformation mechanism coupled with metal and organic cations wrapped is proposed. By solvent vapor annealing, a recrystallization and reorientation of the 2D perovskite slabs occurs to form an ideal structure with improved device performance and stability.
Persistent Identifierhttp://hdl.handle.net/10722/285497
ISSN
2023 Impact Factor: 27.4
2023 SCImago Journal Rankings: 9.191
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSong, J-
dc.contributor.authorZhou, G-
dc.contributor.authorChen, W-
dc.contributor.authorZhang, Q-
dc.contributor.authorAli, J-
dc.contributor.authorHu, Q-
dc.contributor.authorWang, J-
dc.contributor.authorWang, C-
dc.contributor.authorFeng, W-
dc.contributor.authorDjurisic, A-
dc.contributor.authorZhu, H-
dc.contributor.authorZhang, Y-
dc.contributor.authorRussell, T-
dc.contributor.authorLiu, F-
dc.date.accessioned2020-08-18T03:53:59Z-
dc.date.available2020-08-18T03:53:59Z-
dc.date.issued2020-
dc.identifier.citationAdvanced Materials, 2020, v. 32 n. 36, p. article no. 2002784-
dc.identifier.issn0935-9648-
dc.identifier.urihttp://hdl.handle.net/10722/285497-
dc.description.abstract2D perovskite solar cells with high stability and high efficiency have attracted significant attention. A systematical static and dynamic structure investigation is carried out to show the details of 2D morphology evolution. A dual additive approach is used, where the synergy between an alkali metal cation and a polar solvent leads to high‐quality 2D perovskite films with sandwich‐type structures and vertical phase segregation. Such novel structure can induce high‐quality 2D slab growth and reduce internal and surface defects, resulting in a high device efficiency of 16.48% with enhanced continuous illumination stability and improved moisture (55–60%) and thermal (85 °C) tolerances. Transient absorption spectra reveal the carrier migration from low n to high n species with different kinetics. An [PbI6]4− octagon coalescence transformation mechanism coupled with metal and organic cations wrapped is proposed. By solvent vapor annealing, a recrystallization and reorientation of the 2D perovskite slabs occurs to form an ideal structure with improved device performance and stability.-
dc.languageeng-
dc.publisherWiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2089-
dc.relation.ispartofAdvanced Materials-
dc.rightsThis is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.-
dc.subject2D perovskites-
dc.subjectcrystallization kinetics-
dc.subjectin situ GIWAXS-
dc.subjectsandwich‐type structures-
dc.titleUnraveling the Crystallization Kinetics of 2D Perovskites with Sandwich‐Type Structure for High‐Performance Photovoltaics-
dc.typeArticle-
dc.identifier.emailChen, W: chenw20@hku.hk-
dc.identifier.emailDjurisic, A: dalek@hku.hk-
dc.identifier.authorityDjurisic, A=rp00690-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/adma.202002784-
dc.identifier.scopuseid_2-s2.0-85088321056-
dc.identifier.hkuros312904-
dc.identifier.volume32-
dc.identifier.issue36-
dc.identifier.spagearticle no. 2002784-
dc.identifier.epagearticle no. 2002784-
dc.identifier.isiWOS:000550897900001-
dc.publisher.placeGermany-
dc.identifier.issnl0935-9648-

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