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Article: N-type conjugated polymer as efficient electron transport layer for planar inverted perovskite solar cells with power conversion efficiency of 20.86%

TitleN-type conjugated polymer as efficient electron transport layer for planar inverted perovskite solar cells with power conversion efficiency of 20.86%
Authors
KeywordsN-type conjugated polymer
Electron transport materials
Inverted perovskite solar cell
Long-term stability
Issue Date2020
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/issn/22112855
Citation
Nano Energy, 2020, v. 68, p. article no. 104363 How to Cite?
AbstractFullerene and its derivatives are commonly used as electron transport layers (ETLs) in inverted perovskite solar cells (PSCs), since they show suitable band alignment and good electron mobility. However, fullerene-based ETLs typically result in low open-circuit voltages due to the interfacial defects, and they also exhibit poor photochemical and thermal stability. Consequently, there is great interest in the development of novel ETLs for high-performance inverted PSCs. In this work, two n-type polymers PBTI and PDTzTI are utilized as ETL in inverted PSCs, which are based on bithiophene imide and thienylthiazole imide, respectively. Due to its high electron mobility, well matched energy level alignment together with the passivation of interfacial traps/defects, device with the PDTzTI ETL demonstrates a best power conversion efficiency of 20.86%, which outperform those with PBTI and PCBM ETLs. Owning to the highly hydrophobic properties as well as the mobile ion blocking capability of polymer, PDTzTI ETL based device also exhibits excellent long-term and operational device stability as compared with the PCBM one. Our results demonstrate that rational selection of ETLs has great impact on the device efficiency and stability in inverted planar PSCs and that novel n-type polymer might be ideal alternative ETL in inverted planar PSCs.
Persistent Identifierhttp://hdl.handle.net/10722/286309
ISSN
2019 Impact Factor: 16.602
2015 SCImago Journal Rankings: 4.169

 

DC FieldValueLanguage
dc.contributor.authorChen, W-
dc.contributor.authorShi, Y-
dc.contributor.authorWang, Y-
dc.contributor.authorFeng, X-
dc.contributor.authorDjurisic, AB-
dc.contributor.authorWoo, HY-
dc.contributor.authorGuo, X-
dc.contributor.authorHe, Z-
dc.date.accessioned2020-08-31T07:02:05Z-
dc.date.available2020-08-31T07:02:05Z-
dc.date.issued2020-
dc.identifier.citationNano Energy, 2020, v. 68, p. article no. 104363-
dc.identifier.issn2211-2855-
dc.identifier.urihttp://hdl.handle.net/10722/286309-
dc.description.abstractFullerene and its derivatives are commonly used as electron transport layers (ETLs) in inverted perovskite solar cells (PSCs), since they show suitable band alignment and good electron mobility. However, fullerene-based ETLs typically result in low open-circuit voltages due to the interfacial defects, and they also exhibit poor photochemical and thermal stability. Consequently, there is great interest in the development of novel ETLs for high-performance inverted PSCs. In this work, two n-type polymers PBTI and PDTzTI are utilized as ETL in inverted PSCs, which are based on bithiophene imide and thienylthiazole imide, respectively. Due to its high electron mobility, well matched energy level alignment together with the passivation of interfacial traps/defects, device with the PDTzTI ETL demonstrates a best power conversion efficiency of 20.86%, which outperform those with PBTI and PCBM ETLs. Owning to the highly hydrophobic properties as well as the mobile ion blocking capability of polymer, PDTzTI ETL based device also exhibits excellent long-term and operational device stability as compared with the PCBM one. Our results demonstrate that rational selection of ETLs has great impact on the device efficiency and stability in inverted planar PSCs and that novel n-type polymer might be ideal alternative ETL in inverted planar PSCs.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/issn/22112855-
dc.relation.ispartofNano Energy-
dc.subjectN-type conjugated polymer-
dc.subjectElectron transport materials-
dc.subjectInverted perovskite solar cell-
dc.subjectLong-term stability-
dc.titleN-type conjugated polymer as efficient electron transport layer for planar inverted perovskite solar cells with power conversion efficiency of 20.86%-
dc.typeArticle-
dc.identifier.emailChen, W: chenw20@hku.hk-
dc.identifier.emailDjurisic, AB: dalek@hku.hk-
dc.identifier.authorityDjurisic, AB=rp00690-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.nanoen.2019.104363-
dc.identifier.scopuseid_2-s2.0-85075965274-
dc.identifier.hkuros313475-
dc.identifier.volume68-
dc.identifier.spagearticle no. 104363-
dc.identifier.epagearticle no. 104363-
dc.publisher.placeNetherlands-

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