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Tailor-Making Low-Cost Spiro[fluorene-9,9′-xanthene]-Based 3D Oligomers for Perovskite Solar Cells
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry. KTH, School of Chemical Science and Engineering (CHE), Centres, Centre of Molecular Devices, CMD. University of Washington, United States.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry. KTH, School of Chemical Science and Engineering (CHE), Centres, Centre of Molecular Devices, CMD.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry. KTH, School of Chemical Science and Engineering (CHE), Centres, Centre of Molecular Devices, CMD.
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2017 (English)In: Chem, ISSN 2451-9308, Vol. 2, no 5, 676-687 p.Article in journal (Refereed) Published
Abstract [en]

The power-conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have increased rapidly from about 4% to 22% during the past few years. One of the major challenges for further improvement of the efficiency of PSCs is the lack of sufficiently good hole transport materials (HTMs) to efficiently scavenge the photogenerated holes and aid the transport of the holes to the counter-electrode in the PSCs. In this study, we tailor-made two low-cost spiro[fluorene-9,9′-xanthene] (SFX)-based 3D oligomers, termed X54 and X55, by using a one-pot synthesis approach for PSCs. One of the HTMs, X55, gives a much deeper HOMO level and a higher hole mobility and conductivity than the state-of-the-art HTM, Spiro-OMeTAD. PSC devices based on X55 as the HTM show a very impressive PCE of 20.8% under 100 mW·cm−2 AM1.5G solar illumination, which is much higher than the PCE of the reference devices based on Spiro-OMeTAD (18.8%) and X54 (13.6%) under the same conditions.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 2, no 5, 676-687 p.
Keyword [en]
3D, efficiency, hole transport materials, oligomers, perovskite solar cell, spiro, spiro(fluorene-9, 9′-xanthene), tailor-making
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-209718DOI: 10.1016/j.chempr.2017.03.011Scopus ID: 2-s2.0-85019132357OAI: oai:DiVA.org:kth-209718DiVA: diva2:1114811
Funder
Swedish Energy AgencyKnut and Alice Wallenberg FoundationSwedish Research Council
Note

QC 20170626

Available from: 2017-06-26 Created: 2017-06-26 Last updated: 2017-06-26Bibliographically approved

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