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Article: Triple Interface Passivation Strategy‐Enabled Efficient and Stable Inverted Perovskite Solar Cells

TitleTriple Interface Passivation Strategy‐Enabled Efficient and Stable Inverted Perovskite Solar Cells
Authors
Keywordsinterface defects
inverted planar perovskite solar cells
potassium thiocyanate
stability
triple interface passivation
Issue Date2020
PublisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2366-9608
Citation
Small Methods, 2020, v. 4 n. 12, p. article no. 2000478 How to Cite?
AbstractInverted perovskite solar cells (PSCs) are still suffering low power conversion efficiency because of hole accumulation and trap‐assisted non‐radiative recombination at the interface originating from the large energy offset, interface defects, and rough contact. Here, a triple passivation of the two in‐between surfaces of the hole transport layer (HTL) and perovskite is proposed. The inorganic salt of potassium thiocyanate (KSCN) is introduced to simultaneously cross‐link NiOx, HTL, and methylammonium lead iodide (MAPbI3), which can significantly improve both device performances and stability. In addition to potassium passivation, the thiocyanate shows two good passivation effects on perovskite and NiOx to achieve the triple passivation. The strong NiN bonding exhibits strong polar covalent bond properties to make the electron deviate from the Ni side. Meanwhile, the strong electrostatic force between S and Pb in MAPbI3 makes the Pb atomic layer closer to perovskite to restrain the I atom. Meanwhile, the KSCN modification leads to better valence band alignment. Eventually, the KSCN meditated PSCs exhibit both high efficiency of 21.23% with open‐circuit voltage of 1.14 V and improved operational stability. The demonstration of triple interface passivation contributes to establishing promising multiple passivation strategies for improving the demanding PSC performances and stability.
Persistent Identifierhttp://hdl.handle.net/10722/288079
ISSN
2020 Impact Factor: 14.188
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGAO, ZW-
dc.contributor.authorWANG, Y-
dc.contributor.authorOUYANG, D-
dc.contributor.authorLIU, H-
dc.contributor.authorHUANG, Z-
dc.contributor.authorKIM, J-
dc.contributor.authorChoy, WCH-
dc.date.accessioned2020-10-05T12:07:34Z-
dc.date.available2020-10-05T12:07:34Z-
dc.date.issued2020-
dc.identifier.citationSmall Methods, 2020, v. 4 n. 12, p. article no. 2000478-
dc.identifier.issn2366-9608-
dc.identifier.urihttp://hdl.handle.net/10722/288079-
dc.description.abstractInverted perovskite solar cells (PSCs) are still suffering low power conversion efficiency because of hole accumulation and trap‐assisted non‐radiative recombination at the interface originating from the large energy offset, interface defects, and rough contact. Here, a triple passivation of the two in‐between surfaces of the hole transport layer (HTL) and perovskite is proposed. The inorganic salt of potassium thiocyanate (KSCN) is introduced to simultaneously cross‐link NiOx, HTL, and methylammonium lead iodide (MAPbI3), which can significantly improve both device performances and stability. In addition to potassium passivation, the thiocyanate shows two good passivation effects on perovskite and NiOx to achieve the triple passivation. The strong NiN bonding exhibits strong polar covalent bond properties to make the electron deviate from the Ni side. Meanwhile, the strong electrostatic force between S and Pb in MAPbI3 makes the Pb atomic layer closer to perovskite to restrain the I atom. Meanwhile, the KSCN modification leads to better valence band alignment. Eventually, the KSCN meditated PSCs exhibit both high efficiency of 21.23% with open‐circuit voltage of 1.14 V and improved operational stability. The demonstration of triple interface passivation contributes to establishing promising multiple passivation strategies for improving the demanding PSC performances and stability.-
dc.languageeng-
dc.publisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2366-9608-
dc.relation.ispartofSmall Methods-
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.subjectinterface defects-
dc.subjectinverted planar perovskite solar cells-
dc.subjectpotassium thiocyanate-
dc.subjectstability-
dc.subjecttriple interface passivation-
dc.titleTriple Interface Passivation Strategy‐Enabled Efficient and Stable Inverted Perovskite Solar Cells-
dc.typeArticle-
dc.identifier.emailChoy, WCH: chchoy@eee.hku.hk-
dc.identifier.authorityChoy, WCH=rp00218-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/smtd.202000478-
dc.identifier.scopuseid_2-s2.0-85090991773-
dc.identifier.hkuros315239-
dc.identifier.volume4-
dc.identifier.issue12-
dc.identifier.spagearticle no. 2000478-
dc.identifier.epagearticle no. 2000478-
dc.identifier.isiWOS:000568726500001-
dc.publisher.placeGermany-
dc.identifier.issnl2366-9608-

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