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Facile Synthesis of Fluorene-based Hole Transport Materials for Highly Efficient Perovskite Solar Cells and Solid-State Dye-sensitized Solar Cells
KTH Royal Inst Technol, Dept Chem Chem Sci & Engn, Ctr Mol Devices, Organ Chem, S-10044 Stockholm, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
KTH Royal Inst Technol, Dept Chem Chem Sci & Engn, Ctr Mol Devices, Organ Chem, S-10044 Stockholm, Sweden.
KTH Royal Inst Technol, Dept Chem, Sch Chem Sci & Engn, Appl Phys Chem, S-10044 Stockholm, Sweden.
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2016 (English)In: Nano Energy, ISSN ISSN 2211-2855, EISSN 2211-3282, Vol. 26, 108-113 p.Article in journal (Refereed) Published
Abstract [en]

Two novel low-cost fluorene-based hole transport materials (HTMs) HT1 and HT2 as alternatives to the expensive HTM Spiro-OMeTAD have been designed and synthesized for the application in perovskite solar cells (PSCs) and solid-state dye-sensitized solar cell (ssDSCs). The two HTMs were prepared through a facile two-step reaction from cheap starting material and with a total yield higher than 90%. These HTMs exhibit good solubility and charge-transport ability. PSCs based on HT2 achieved power conversion efficiency (PCE) of 18.04% under air conditions, which is comparable to that of the cell employing the commonly used Spiro-OMeTAD (18.27%), while HT1-based cell showed a slightly worse performance with a PCE of 17.18%. For ssDSCs, the HT2-based device yielded a PCE of 6.35%, which is also comparable to that of a cell fabricated based on Spiro-OMeTAD (6.36%). We found that the larger dimensional structure and molecular weight of HT2 enable better photovoltaic performance than that of the smaller one HT1. These results show that easily synthesized fluorene-based HTMs have great potential to replace the expensive Spiro-OMeTAD for both PSCs and ssDSCs.

Place, publisher, year, edition, pages
2016. Vol. 26, 108-113 p.
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-300743DOI: 10.1016/j.nanoen.2016.05.006ISI: 000384908700014OAI: oai:DiVA.org:uu-300743DiVA: diva2:952247
Funder
Swedish Research CouncilSwedish Energy AgencyKnut and Alice Wallenberg Foundation
Note

De två första författarna delar förstaförfattarskapet.

Available from: 2016-08-12 Created: 2016-08-12 Last updated: 2016-11-17Bibliographically approved

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