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  4. Efficient star-shaped hole transporting materials with diphenylethenyl side arms for an efficient perovskite solar cell
 
research article

Efficient star-shaped hole transporting materials with diphenylethenyl side arms for an efficient perovskite solar cell

Choi, Hyeju
•
Park, Sojin
•
Paek, Sanghyun  
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2014
Journal of Materials Chemistry A

Two symmetrical star-shaped hole transporting materials (HTMs), i.e. FA-MeOPh and TPA-MeOPh with a fused triphenylamine or triphenylamine core and diphenylethenyl side arms were synthesized. FA-MeOPh showed a strong molar absorption coefficient and a red-shifted absorption compared with TPA-MeOPh because of its planar configuration. The power conversion efficiency (PCE) of the perovskite solar cells based on FA-MeOPh and TPA-MeOPh is about 11.86% and 10.79%, in which the efficiency of former is comparable to that (12.75%) of spiro-OMeTAD based cell. The high photocurrent (18.39 mA cm(-2)) of FA-MeOPh based solar cell relative to TPA-MeOPh based one may be attributable to the enhanced absorption in the near-IR region for mp-TiO2/CH3NH3PbI3/HTM based cell. The high mobility and low series resistance of mp-TiO2/CH3NH3PbI3/FA-MeOPh based cell led to the high fill factor (0.698) of FA-MeOPh based solar cell relative to TPA-MeOPh based one (0.627). In addition, the FA-MeOPh based cell showed a relative stability under light soaking for 250 h. The high efficiency, relative stability, synthetically simple and inexpensive materials as the HTMs hold promise to replace the expensive spiro-OMeTAD.

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Type
research article
DOI
10.1039/c4ta04179h
Web of Science ID

WOS:000344384000003

Author(s)
Choi, Hyeju
Park, Sojin
Paek, Sanghyun  
Ekanayake, Piyasiri
Nazeeruddin, Mohammad Khaja  
Ko, Jaejung
Date Issued

2014

Publisher

Royal Society of Chemistry

Published in
Journal of Materials Chemistry A
Volume

2

Issue

45

Start page

19136

End page

19140

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GMF  
LPI  
Available on Infoscience
December 30, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/109570
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