Facile synthesis of fluorene-based hole transport materials for highly efficient perovskite solar cells and solid-state dye-sensitized solar cells
2016 (English)In: Nano Energy, ISSN 2211-2855, Vol. 26, 108-113 p.Article in journal (Refereed) Published
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. © 2016 Elsevier Ltd.
Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 26, 108-113 p.
Fluorene, Hole-transport material, Perovskite solar cells, Solid-state dye sensitized solar cell, Dyes, Hole mobility, Perovskite, Photoconducting materials, Solar cells, Dimensional structures, Facile synthesis, Fluorenes, Hole transport materials, Photovoltaic performance, Power conversion efficiencies, Solid-state dye-sensitized solar cells, Two-step reactions, Dye-sensitized solar cells
Chemical Sciences Energy Engineering
IdentifiersURN: urn:nbn:se:kth:diva-197103DOI: 10.1016/j.nanoen.2016.05.006ScopusID: 2-s2.0-84969160182OAI: oai:DiVA.org:kth-197103DiVA: diva2:1056033
FunderSwedish Research Council
QC 201612132016-12-132016-11-302016-12-13Bibliographically approved