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research article

Mixed-Organic-Cation Perovskite Photovoltaics for Enhanced Solar-Light Harvesting

Pellet, Norman  
•
Gao, Peng  
•
Gregori, Giuliano
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2014
Angewandte Chemie International Edition

Hybrid organic-inorganic lead halide perovskite APbX(3) pigments, such as methylammonium lead iodide, have recently emerged as excellent light harvesters in solid-state mesoscopic solar cells. An important target for the further improvement of the performance of perovskite-based photovoltaics is to extend their optical-absorption onset further into the red to enhance solar-light harvesting. Herein, we show that this goal can be reached by using a mixture of formamidinium (HN=CHNH3+, FA) and methylammonium (CH3NH3+, MA) cations in the Aposition of the APbI(3) perovskite structure. This combination leads to an enhanced short-circuit current and thus superior devices to those based on only CH3NH3+. This concept has not been applied previously in perovskite-based solar cells. It shows great potential as a versatile tool to tune the structural, electrical, and optoelectronic properties of the light-harvesting materials.

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Type
research article
DOI
10.1002/anie.201309361
Web of Science ID

WOS:000332747700018

Author(s)
Pellet, Norman  
•
Gao, Peng  
•
Gregori, Giuliano
•
Yang, Tae-Youl
•
Nazeeruddin, Mohammad K.  
•
Maier, Joachim
•
Graetzel, Michael  
Date Issued

2014

Publisher

Wiley-Blackwell

Published in
Angewandte Chemie International Edition
Volume

53

Issue

12

Start page

3151

End page

3157

Subjects

energy conversion

•

light harvesting

•

organic cations

•

perovskite solar cells

•

photovoltaics

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
Available on Infoscience
June 16, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/104358
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