Tailor-Making Low-Cost Spiro[fluorene-9,9′-xanthene]-Based 3D Oligomers for Perovskite Solar Cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Bo Xu
  • Jinbao Zhang
  • Yong Hua
  • Peng Liu
  • Linqin Wang
  • Changqing Ruan
  • Yuanyuan Li
  • Gerrit Boschloo
  • Erik M.J. Johansson
  • Lars Kloo
  • Anders Hagfeldt
  • Licheng Sun

Detail(s)

Original languageEnglish
Pages (from-to)676-687
Journal / PublicationChem
Volume2
Issue number5
Publication statusPublished - 11 May 2017
Externally publishedYes

Abstract

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.

Research Area(s)

  • 3D, efficiency, hole transport materials, oligomers, perovskite solar cell, spiro, spiro(fluorene-9,9′-xanthene), tailor-making

Citation Format(s)

Tailor-Making Low-Cost Spiro[fluorene-9,9′-xanthene]-Based 3D Oligomers for Perovskite Solar Cells. / Xu, Bo; Zhang, Jinbao; Hua, Yong; Liu, Peng; Wang, Linqin; Ruan, Changqing; Li, Yuanyuan; Boschloo, Gerrit; Johansson, Erik M.J.; Kloo, Lars; Hagfeldt, Anders; Jen, Alex K.-Y.; Sun, Licheng.

In: Chem, Vol. 2, No. 5, 11.05.2017, p. 676-687.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review