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Article: Stabilizing n-type hetero-junctions for NiOx based inverted planar perovskite solar cells with an efficiency of 21.6%

TitleStabilizing n-type hetero-junctions for NiOx based inverted planar perovskite solar cells with an efficiency of 21.6%
Authors
KeywordsCadmium compounds
Efficiency
Heterojunctions
Metals
Nickel oxide
Issue Date2020
PublisherRSC Publications. The Journal's web site is located at http://pubs.rsc.org/en/journals/journalissues/ta#!recentarticles&all
Citation
Journal of Materials Chemistry A, 2020, v. 8 n. 4, p. 1865-1874 How to Cite?
AbstractThe performance and stability of inverted perovskite solar cells (PSC), in particular, those with stable metal oxide hole transport layers, are limited by the instability of perovskite/electron transport layer heterojunctions. In this work, we demonstrate a successful strategy for passivating and stabilizing the perovskite/electronic transport layer n-type heterojunction in a nickel oxide based inverted planar PSC by using chemically stable inorganic CdxZn1−xSeyS1−y quantum dots (QDs). Experimental and theoretical results demonstrate that the defects/traps (unsaturated Pb2+ and mobile iodine ions) on perovskite surfaces can be substantially suppressed by the QDs, leading to a significant reduction of interfacial recombination and more stable n-type heterojunction. Consequently, a significant enhancement of the open-circuit voltage from 1.075 V to 1.162 V and power conversion efficiency from 19.47% to 21.63% is achieved for the QD passivated perovskite-based devices. We also demonstrate that the stabilized n-type hetero-junction results in a dramatic improvement of long-term and operational device stability. Our work demonstrates an effective and simple way to stabilize the perovskite/electron transport layer interface to develop high efficiency stable inverted planar PSCs, which will bring these devices closer to future commercial applications.
Persistent Identifierhttp://hdl.handle.net/10722/281240
ISSN
2020 Impact Factor: 12.732
2020 SCImago Journal Rankings: 3.637
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChen, W-
dc.contributor.authorPang, G-T-
dc.contributor.authorZhou, Y-C-
dc.contributor.authorSun, Y-Z-
dc.contributor.authorLiu, F-Z-
dc.contributor.authorChen, R-
dc.contributor.authorChen, S-M-
dc.contributor.authorDjurisic, AB-
dc.contributor.authorHe, Z-B-
dc.date.accessioned2020-03-09T09:52:00Z-
dc.date.available2020-03-09T09:52:00Z-
dc.date.issued2020-
dc.identifier.citationJournal of Materials Chemistry A, 2020, v. 8 n. 4, p. 1865-1874-
dc.identifier.issn2050-7488-
dc.identifier.urihttp://hdl.handle.net/10722/281240-
dc.description.abstractThe performance and stability of inverted perovskite solar cells (PSC), in particular, those with stable metal oxide hole transport layers, are limited by the instability of perovskite/electron transport layer heterojunctions. In this work, we demonstrate a successful strategy for passivating and stabilizing the perovskite/electronic transport layer n-type heterojunction in a nickel oxide based inverted planar PSC by using chemically stable inorganic CdxZn1−xSeyS1−y quantum dots (QDs). Experimental and theoretical results demonstrate that the defects/traps (unsaturated Pb2+ and mobile iodine ions) on perovskite surfaces can be substantially suppressed by the QDs, leading to a significant reduction of interfacial recombination and more stable n-type heterojunction. Consequently, a significant enhancement of the open-circuit voltage from 1.075 V to 1.162 V and power conversion efficiency from 19.47% to 21.63% is achieved for the QD passivated perovskite-based devices. We also demonstrate that the stabilized n-type hetero-junction results in a dramatic improvement of long-term and operational device stability. Our work demonstrates an effective and simple way to stabilize the perovskite/electron transport layer interface to develop high efficiency stable inverted planar PSCs, which will bring these devices closer to future commercial applications.-
dc.languageeng-
dc.publisherRSC Publications. The Journal's web site is located at http://pubs.rsc.org/en/journals/journalissues/ta#!recentarticles&all-
dc.relation.ispartofJournal of Materials Chemistry A-
dc.subjectCadmium compounds-
dc.subjectEfficiency-
dc.subjectHeterojunctions-
dc.subjectMetals-
dc.subjectNickel oxide-
dc.titleStabilizing n-type hetero-junctions for NiOx based inverted planar perovskite solar cells with an efficiency of 21.6%-
dc.typeArticle-
dc.identifier.emailLiu, F-Z: liufz@hku.hk-
dc.identifier.emailDjurisic, AB: dalek@hku.hk-
dc.identifier.authorityDjurisic, AB=rp00690-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/C9TA12368G-
dc.identifier.scopuseid_2-s2.0-85078670214-
dc.identifier.hkuros309256-
dc.identifier.volume8-
dc.identifier.issue4-
dc.identifier.spage1865-
dc.identifier.epage1874-
dc.identifier.isiWOS:000511170800028-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl2050-7496-

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