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Polymeric, Cost-Effective, Dopant-Free Hole Transport Materials for Efficient and Stable Perovskite Solar Cells
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Coating Technology.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Organic chemistry.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Organic chemistry.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.ORCID iD: 0000-0002-1591-5815
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2019 (English)In: Journal of the American Chemical Society, Vol. 141, no 50, p. 19700-19707Article in journal (Refereed) Published
Abstract [en]

Perovskite solar cells (PSCs) has skyrocketed in the past decade to an unprecedented level due to their outstanding photoelectric properties and facile processability. However, the utilization of expensive hole transport materials (HTMs) and the inevitable instability instigated by the deliquescent dopants represent major concerns hindering further commercialization. Here, a series of low-cost, conjugated polymers are designed and applied as dopant-free HTMs in PSCs, featuring tuned energy levels, good temperature and humidity resistivity, and excellent photoelectric properties. Further studies highlight the critical and multifaceted roles of the polymers with respect to facilitating charge separation, passivating the surface trap sites of perovskite materials, and guaranteeing long-term stability of the devices. A stabilized power conversion efficiency (PCE) of 20.3% and remarkably enhanced device longevity are achieved using the dopant-free polymer P3 with a low concentration of 5 mg/mL, qualifying the device as one of the best PSC systems constructed on the basis of dopant-free HTMs so far. In addition, the flexible PSCs based on P3 also exhibit a PCE of 16.2%. This work demonstrates a promising route toward commercially viable, stable, and efficient PSCs.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019. Vol. 141, no 50, p. 19700-19707
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Chemical Sciences
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URN: urn:nbn:se:kth:diva-268287DOI: 10.1021/jacs.9b08424ISI: 000503917800028PubMedID: 31747277Scopus ID: 2-s2.0-85076243482OAI: oai:DiVA.org:kth-268287DiVA, id: diva2:1415370
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QC 20200318

Available from: 2020-03-18 Created: 2020-03-18 Last updated: 2020-04-02Bibliographically approved

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Publisher's full textPubMedScopushttps://pubs.acs.org/doi/10.1021/jacs.9b08424

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Zhang, FuguoYao, ZhaoyangGuo, YaxiaoLi, YuanyuanBergstrand, JanBrett, CalvinHajian, AlirezaGardner, James M.Widengren, JerkerRoth, Stephan V.Kloo, LarsSun, Licheng

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Zhang, FuguoYao, ZhaoyangGuo, YaxiaoLi, YuanyuanBergstrand, JanBrett, CalvinHajian, AlirezaGardner, James M.Widengren, JerkerRoth, Stephan V.Kloo, LarsSun, Licheng
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ChemistryCoating TechnologyOrganic chemistryWallenberg Wood Science CenterFibre- and Polymer TechnologyQuantum and BiophotonicsCentre of Molecular Devices, CMDApplied Physical ChemistryBiocompositesChemistry
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