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Article: Synergistic Reinforcement of Built‐In Electric Fields for Highly Efficient and Stable Perovskite Photovoltaics

TitleSynergistic Reinforcement of Built‐In Electric Fields for Highly Efficient and Stable Perovskite Photovoltaics
Authors
Keywordsbuilt‐in electric fields
dipole molecules
perovskite solar cells
Issue Date2020
PublisherWiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afm
Citation
Advanced Functional Materials, 2020, v. 30 n. 19, p. article no. 1909755 How to Cite?
AbstractPerovskite solar cells (PSCs) have received great attention due to their outstanding performance and their low processing costs. To boost their performance, one approach is to reinforce the built‐in electric field (BEF) to promote oriented carrier transport. The BEF is maximized by reinforcing the work function difference between cathode and anode (Δμ1) and increasing the work function difference between lower and upper surfaces of perovskite film (Δμ2) via introduction of electric dipole molecules, denoted as PTFCN and CF3BACl. The synergistic reinforcement of BEF improves charge transport and collection, and realizes markedly high photovoltaic performances with the best power conversion efficiency (PCE) up to 21.5%, a growth of 15.6% as compared to the control device, which is higher than the superposition of improvements achieved by either raising Δμ1 or Δμ2. Importantly, dual‐functional CF3BACl not only supplies dipole effect for tuning the surface potential of perovskite but offers hydrophobic trifluoride group toward the long‐term stable unencapsulated PSCs retaining more than 95% PCE after storing 2000 h under ambient conditions. This work demonstrates the synergistic effect of Δμ1 and Δμ2, providing an effective strategy for the further development of PSC in terms of photovoltaic conversion and stability.
Persistent Identifierhttp://hdl.handle.net/10722/288104
ISSN
2019 Impact Factor: 16.836
2015 SCImago Journal Rankings: 5.210

 

DC FieldValueLanguage
dc.contributor.authorWang, WT-
dc.contributor.authorChen, P-
dc.contributor.authorChiang, CH-
dc.contributor.authorGuo, TF-
dc.contributor.authorWu, CG-
dc.contributor.authorFeng, SP-
dc.date.accessioned2020-10-05T12:07:55Z-
dc.date.available2020-10-05T12:07:55Z-
dc.date.issued2020-
dc.identifier.citationAdvanced Functional Materials, 2020, v. 30 n. 19, p. article no. 1909755-
dc.identifier.issn1616-301X-
dc.identifier.urihttp://hdl.handle.net/10722/288104-
dc.description.abstractPerovskite solar cells (PSCs) have received great attention due to their outstanding performance and their low processing costs. To boost their performance, one approach is to reinforce the built‐in electric field (BEF) to promote oriented carrier transport. The BEF is maximized by reinforcing the work function difference between cathode and anode (Δμ1) and increasing the work function difference between lower and upper surfaces of perovskite film (Δμ2) via introduction of electric dipole molecules, denoted as PTFCN and CF3BACl. The synergistic reinforcement of BEF improves charge transport and collection, and realizes markedly high photovoltaic performances with the best power conversion efficiency (PCE) up to 21.5%, a growth of 15.6% as compared to the control device, which is higher than the superposition of improvements achieved by either raising Δμ1 or Δμ2. Importantly, dual‐functional CF3BACl not only supplies dipole effect for tuning the surface potential of perovskite but offers hydrophobic trifluoride group toward the long‐term stable unencapsulated PSCs retaining more than 95% PCE after storing 2000 h under ambient conditions. This work demonstrates the synergistic effect of Δμ1 and Δμ2, providing an effective strategy for the further development of PSC in terms of photovoltaic conversion and stability.-
dc.languageeng-
dc.publisherWiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afm-
dc.relation.ispartofAdvanced Functional 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.subjectbuilt‐in electric fields-
dc.subjectdipole molecules-
dc.subjectperovskite solar cells-
dc.titleSynergistic Reinforcement of Built‐In Electric Fields for Highly Efficient and Stable Perovskite Photovoltaics-
dc.typeArticle-
dc.identifier.emailWang, WT: wtwang77@hku.hk-
dc.identifier.emailFeng, SP: hpfeng@hku.hk-
dc.identifier.authorityFeng, SP=rp01533-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/adfm.201909755-
dc.identifier.scopuseid_2-s2.0-85081545447-
dc.identifier.hkuros315427-
dc.identifier.volume30-
dc.identifier.issue19-
dc.identifier.spagearticle no. 1909755-
dc.identifier.epagearticle no. 1909755-
dc.publisher.placeGermany-

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