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Article: Engineering of dendritic dopant-free hole transport molecules: enabling ultrahigh fill factor in perovskite solar cells with optimized dendron construction

TitleEngineering of dendritic dopant-free hole transport molecules: enabling ultrahigh fill factor in perovskite solar cells with optimized dendron construction
Authors
Keywordsdendritic molecules
hole-transporting materials
dopant-free
ultrahigh fill factor
perovskite solar cells
Issue Date2021
PublisherSpringer Verlag, co-published with Science China Press. The Journal's web site is located at https://link.springer.com/journal/11426
Citation
Science China Chemistry, 2021, v. 64, p. 41-51 How to Cite?
AbstractDeveloping dopant-free hole-transporting materials (HTMs) for high-performance perovskite solar cells (PVSCs) has been a very active research topic in recent years since HTMs play a critical role in optimizing interfacial charge carrier kinetics and in turn determining device performance. Here, a novel dendritic engineering strategy is first utilized to design HTMs with a D-A type molecular framework, and diphenylamine and/or carbazole is selected as the building block for constructing dendrons. All HTMs show good thermal stability and excellent film morphology, and the key optoelectronic properties could be fine-tuned by varying the dendron structure. Among them, MPA-Cz-BTI and MCz-Cz-BTI exhibit an improved interfacial contact with the perovskite active layer, and non-radiative recombination loss and charge transport loss can be effectively suppressed. Consequently, high power conversion efficiencies (PCEs) of 20.8% and 21.35% are achieved for MPA-Cz-BTI and MCz-Cz-BTI based devices, respectively, accompanied by excellent long-term storage stability. More encouragingly, ultrahigh fill factors of 85.2% and 83.5% are recorded for both devices, which are among the highest values reported to date. This work demonstrates the great potential of dendritic materials as a new type of dopant-free HTMs for high-performance PVSCs with excellent FF.
Persistent Identifierhttp://hdl.handle.net/10722/293410
ISSN
2020 Impact Factor: 9.445
2020 SCImago Journal Rankings: 1.870
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChen, W-
dc.contributor.authorWang, Y-
dc.contributor.authorLiu, B-
dc.contributor.authorGao, Y-
dc.contributor.authorWu, Z-
dc.contributor.authorShi, Y-
dc.contributor.authorTang, Y-
dc.contributor.authorYang, K-
dc.contributor.authorZhang, Y-
dc.contributor.authorSun, W-
dc.contributor.authorFeng, X-
dc.contributor.authorLaquai, F-
dc.contributor.authorWoo, HY-
dc.contributor.authorDjurisic, A-
dc.contributor.authorGuo, X-
dc.contributor.authorHe, Z-
dc.date.accessioned2020-11-23T08:16:21Z-
dc.date.available2020-11-23T08:16:21Z-
dc.date.issued2021-
dc.identifier.citationScience China Chemistry, 2021, v. 64, p. 41-51-
dc.identifier.issn1674-7291-
dc.identifier.urihttp://hdl.handle.net/10722/293410-
dc.description.abstractDeveloping dopant-free hole-transporting materials (HTMs) for high-performance perovskite solar cells (PVSCs) has been a very active research topic in recent years since HTMs play a critical role in optimizing interfacial charge carrier kinetics and in turn determining device performance. Here, a novel dendritic engineering strategy is first utilized to design HTMs with a D-A type molecular framework, and diphenylamine and/or carbazole is selected as the building block for constructing dendrons. All HTMs show good thermal stability and excellent film morphology, and the key optoelectronic properties could be fine-tuned by varying the dendron structure. Among them, MPA-Cz-BTI and MCz-Cz-BTI exhibit an improved interfacial contact with the perovskite active layer, and non-radiative recombination loss and charge transport loss can be effectively suppressed. Consequently, high power conversion efficiencies (PCEs) of 20.8% and 21.35% are achieved for MPA-Cz-BTI and MCz-Cz-BTI based devices, respectively, accompanied by excellent long-term storage stability. More encouragingly, ultrahigh fill factors of 85.2% and 83.5% are recorded for both devices, which are among the highest values reported to date. This work demonstrates the great potential of dendritic materials as a new type of dopant-free HTMs for high-performance PVSCs with excellent FF.-
dc.languageeng-
dc.publisherSpringer Verlag, co-published with Science China Press. The Journal's web site is located at https://link.springer.com/journal/11426-
dc.relation.ispartofScience China Chemistry-
dc.rightsThis is a post-peer-review, pre-copyedit version of an article published in [insert journal title]. The final authenticated version is available online at: https://doi.org/[insert DOI]-
dc.subjectdendritic molecules-
dc.subjecthole-transporting materials-
dc.subjectdopant-free-
dc.subjectultrahigh fill factor-
dc.subjectperovskite solar cells-
dc.titleEngineering of dendritic dopant-free hole transport molecules: enabling ultrahigh fill factor in perovskite solar cells with optimized dendron construction-
dc.typeArticle-
dc.identifier.emailChen, W: chenw20@hku.hk-
dc.identifier.emailDjurisic, A: dalek@hku.hk-
dc.identifier.authorityDjurisic, A=rp00690-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s11426-020-9857-1-
dc.identifier.hkuros318864-
dc.identifier.volume64-
dc.identifier.spage41-
dc.identifier.epage51-
dc.identifier.isiWOS:000578954100001-
dc.publisher.placeGermany-

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