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research article

Rational design of triazatruxene-based hole conductors for perovskite solar cells

Javier Ramos, F.
•
Rakstys, Kasparas  
•
Kazim, Samrana
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2015
Rsc Advances

Triazatruxene core based hole transporting materials (HTMs), HMDI (5,10,15-trihexyl-3,8,13-trimethoxy-10,15-dihydro-5H-diindolo[3,2-a: 3',2'-c]carbazole) and HPDI (5,10,15-tris(4-(hexyloxy)phenyl)-10,15-dihydro-5H-diindolo[3,2-a: 3',2'-c]carbazole) were synthesized and exploited in perovskite based solar cells. The energy levels of star-shaped HMDI and HPDI were tuned by symmetrically introducing electron-rich alkoxy side groups. These soluble and easily synthesized materials exhibit optical transparency in the visible region, high thermal stability and have suitable HOMO values with respect to perovskite, making them an ideal HTM candidate for efficient perovskite solar cells. The HPDI molecule-based devices gave competitive power conversion efficiencies of similar to 11% under AM 1.5G illumination. The facile synthetic approach using inexpensive precursor materials will facilitate triazatruxene-based molecules to be further exploited in thin film organic-inorganic perovskite solar cells and needs optimization to enhance power conversion efficiency.

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Type
research article
DOI
10.1039/c5ra06876b
Web of Science ID

WOS:000356801300033

Author(s)
Javier Ramos, F.
•
Rakstys, Kasparas  
•
Kazim, Samrana
•
Graetzel, Michael  
•
Nazeeruddin, Mohammad Khaja  
•
Ahmad, Shahzada
Date Issued

2015

Publisher

Royal Soc Chemistry

Published in
Rsc Advances
Volume

5

Issue

66

Start page

53426

End page

53432

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GMF  
LPI  
Available on Infoscience
September 28, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/119134
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