NDLI: Low band gap <i>S</i>,<i>N</i>-heteroacene-based oligothiophenes as hole-transporting and light absorbing materials for efficient perovskite-based solar cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Zakeeruddin, Shaik M. Grätzel, Michael Qin, Peng Bäuerle, Peter Nazeeruddin, Mohammad K. Kast, Hannelore Mishra, Amaresh
Copyright Year	2014
Abstract	Novel low band gap oligothiophenes incorporating S,N-heteropentacene central units were developed and used as hole-transport materials (HTMs) in solid-state perovskite-based solar cells. In addition to appropriate electronic energy levels, these materials show high photo-absorptivity in the low energy region, and thus can contribute to the light harvesting of the solar spectrum. Solution-processed CH3NH3PbI3-based devices using these HTMs achieved power conversion efficiencies of 9.5–10.5% in comparison with 7.6% obtained by reference devices without HTMs. Photoinduced absorption spectroscopy gave further insight into the charge transfer behavior between photoexcited perovskites and the HTMs.
Starting Page	2981
Ending Page	2985
Page Count	5
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	7
Issue Number	9
Journal	Energy & Environmental Science
DOI	10.1039/c4ee01220h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Band gap Spectroscopy
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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Low band gap S,N-heteroacene-based oligothiophenes as hole-transporting and light absorbing materials for efficient perovskite-based solar cells