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Article: Improving the stability and performance of perovskite solar cells via off-the-shelf post-device ligand treatment

TitleImproving the stability and performance of perovskite solar cells via off-the-shelf post-device ligand treatment
Authors
Issue Date2018
PublisherRSC Publications. The Journal's web site is located at http://pubs.rsc.org/en/journals/journalissues/ee#!recentarticles&all
Citation
Energy & Environmental Science, 2018, v. 11 n. 8, p. 2253-2262 How to Cite?
AbstractWhile metal halide perovskite solar cells (PVSCs) have drawn intense attention due to their high solar-to-power conversion efficiency (PCE), their practical application is hampered by their poor long-term stability against moisture. Although strategies have been reported to solve this issue, these methods are introduced during core-device fabrication processes which will increase the risk of introducing unexpected impurities during the fabrication. Herein, we introduce the first kind of simple post-device ligand (PDL) treatment to significantly improve the PCE of completely fabricated PVSCs from 18.7% to 20.13%. Meanwhile, the stability of the treated devices without any encapsulation remarkably improves, with 70% PCE maintained under ambient conditions after a 500-hour maximum-power-point tracking test, while the control unencapsulated device will completely break down within 100 hours. Equally important is that this post-device treatment shows a special ‘stitching effect’, namely repairing the as-fabricated ‘poor devices’ by healing the defects of the perovskite active region, and can improve the PCE by over 900%. We also experimentally and theoretically study the fundamental mechanism of the improvement. Consequently, our approach greatly improves the production yield of high-quality PVSCs and their module performances as well as the reduction of lead-waste. Additionally, the treatment is an off-the-shelf post-device approach that can be integrated into any existing perovskite-device fabrication, offering a general strategy to improve the stability and performance of perovskite optoelectronic devices.
Persistent Identifierhttp://hdl.handle.net/10722/259313
ISSN
2017 Impact Factor: 30.067
2015 SCImago Journal Rankings: 10.475
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, H-
dc.contributor.authorRen, X-
dc.contributor.authorChen, X-
dc.contributor.authorMao, J-
dc.contributor.authorCheng, J-
dc.contributor.authorZhao, Y-
dc.contributor.authorLiu, Y-
dc.contributor.authorMilic, J-
dc.contributor.authorYin, WJ-
dc.contributor.authorGrätzel, M-
dc.contributor.authorChoy, WCH-
dc.date.accessioned2018-09-03T04:05:00Z-
dc.date.available2018-09-03T04:05:00Z-
dc.date.issued2018-
dc.identifier.citationEnergy & Environmental Science, 2018, v. 11 n. 8, p. 2253-2262-
dc.identifier.issn1754-5692-
dc.identifier.urihttp://hdl.handle.net/10722/259313-
dc.description.abstractWhile metal halide perovskite solar cells (PVSCs) have drawn intense attention due to their high solar-to-power conversion efficiency (PCE), their practical application is hampered by their poor long-term stability against moisture. Although strategies have been reported to solve this issue, these methods are introduced during core-device fabrication processes which will increase the risk of introducing unexpected impurities during the fabrication. Herein, we introduce the first kind of simple post-device ligand (PDL) treatment to significantly improve the PCE of completely fabricated PVSCs from 18.7% to 20.13%. Meanwhile, the stability of the treated devices without any encapsulation remarkably improves, with 70% PCE maintained under ambient conditions after a 500-hour maximum-power-point tracking test, while the control unencapsulated device will completely break down within 100 hours. Equally important is that this post-device treatment shows a special ‘stitching effect’, namely repairing the as-fabricated ‘poor devices’ by healing the defects of the perovskite active region, and can improve the PCE by over 900%. We also experimentally and theoretically study the fundamental mechanism of the improvement. Consequently, our approach greatly improves the production yield of high-quality PVSCs and their module performances as well as the reduction of lead-waste. Additionally, the treatment is an off-the-shelf post-device approach that can be integrated into any existing perovskite-device fabrication, offering a general strategy to improve the stability and performance of perovskite optoelectronic devices.-
dc.languageeng-
dc.publisherRSC Publications. The Journal's web site is located at http://pubs.rsc.org/en/journals/journalissues/ee#!recentarticles&all-
dc.relation.ispartofEnergy & Environmental Science-
dc.titleImproving the stability and performance of perovskite solar cells via off-the-shelf post-device ligand treatment-
dc.typeArticle-
dc.identifier.emailChoy, WCH: chchoy@eee.hku.hk-
dc.identifier.authorityChoy, WCH=rp00218-
dc.identifier.doi10.1039/C8EE00580J-
dc.identifier.hkuros289875-
dc.identifier.hkuros290288-
dc.identifier.volume11-
dc.identifier.issue8-
dc.identifier.spage2253-
dc.identifier.epage2262-
dc.identifier.isiWOS:000442262900033-
dc.publisher.placeUnited Kingdom-

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