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research article

Facile synthesized organic hole transporting material for perovskite solar cell with efficiency of 19.8%

Bi, Dongqin  
•
Xu, Bo
•
Gao, Peng  
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2016
Nano Energy

The exploration of alternative molecular hole-transporting materials (HTMs) specifically for high performance perovskite solar cells (PSCs) is a relatively recent research area. Aiming for further increasing the 'efficiency-cost ratio' of PSCs, we developed a spiro[fluorene-9,9'-xanthene] based HTM (X59) via two-step synthesis from commercial precursors for perovskite solar cells (PSCs) that works as effectively as the well-known HTM-Spiro-OMeTAD-based device under the same conditions. The molecular structure was analyzed by X-ray crystallography indicating a similar packing regime as for Spiro-OMeTAD. An impressive PCE of 19.8% was achieved by using X59 as HTM in PSC, which can compete with the record PCE of 20.8% by using the state-of-the-art-HTM Spiro-OMeTAD (Tress et al., 2016) [1]. The optimized devices employing X59 as HTM exhibited minimized hysteresis, excellent reproducibility and reasonable stability under dark and dry conditions. The present finding highlights the potential of spiro-type HTM for high performance PSCs and paves the way to a much deceased fabrication cost for potential commercialization of perovskite solar panels. (C) 2016 Elsevier Ltd. All rights reserved.

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Type
research article
DOI
10.1016/j.nanoen.2016.03.020
Web of Science ID

WOS:000375045900017

Author(s)
Bi, Dongqin  
Xu, Bo
Gao, Peng  
Sun, Licheng
Graetzel, Michael  
Hagfeldt, Anders  
Date Issued

2016

Publisher

Elsevier Science Bv

Published in
Nano Energy
Volume

23

Start page

138

End page

144

Subjects

Hole transporting material

•

Perovskite

•

Hysteresis

•

Single crystal

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSPM  
LPI  
Available on Infoscience
July 19, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/127800
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