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research article

A-D-A-type S,N-heteropentacene-based hole transport materials for dopant-free perovskite solar cells

Steck, Christopher
•
Franckevicius, Marius  
•
Zakeeruddin, Shaik Mohammed  
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2015
Journal Of Materials Chemistry A

This work reports the design and synthesis of acceptor-donor-acceptor (A-D-A) type low band gap hole transport materials (HTM) comprising S,N-heteropentacene central units for solid-state perovskite-based solar cells. The optical and electrochemical properties were tuned by the insertion of thiophene or ethylenedioxythiophene units in the molecular backbone. These HTMs showed strong absorption in the visible region and suitable highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies with respect to the CH3NH3PbI3 perovskite. Mesoscopic solid state perovskite solar cells prepared by solution-processing using these HTMs generated power conversion efficiencies (PCE) of 10.3-11.4% without the use of any additive or dopant. The charge transfer behavior between photoexcited perovskite and the HTMs was further investigated by photo-induced absorption spectroscopy.

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Type
research article
DOI
10.1039/c5ta03865k
Web of Science ID

WOS:000360049900030

Author(s)
Steck, Christopher
•
Franckevicius, Marius  
•
Zakeeruddin, Shaik Mohammed  
•
Mishra, Amaresh
•
Baeuerle, Peter
•
Graetzel, Michael  
Date Issued

2015

Publisher

Royal Society of Chemistry

Published in
Journal Of Materials Chemistry A
Volume

3

Issue

34

Start page

17738

End page

17746

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
Available on Infoscience
September 28, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/119058
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