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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

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    Type
    Article
    Authors
    Qin, Peng
    Kast, Hannelore
    Nazeeruddin, Mohammad K.
    Zakeeruddin, Shaik M.
    Mishra, Amaresh
    Bäuerle, Peter
    Grätzel, Michael
    KAUST Grant Number
    KUS-C1-015-21
    Date
    2014-07-15
    Permanent link to this record
    http://hdl.handle.net/10754/598737
    
    Metadata
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    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. This journal is © the Partner Organisations 2014.
    Citation
    Qin P, Kast H, Nazeeruddin MK, Zakeeruddin SM, Mishra A, et al. (2014) Low band gap S,N-heteroacene-based oligothiophenes as hole-transporting and light absorbing materials for efficient perovskite-based solar cells. Energy Environ Sci 7: 2981. Available: http://dx.doi.org/10.1039/c4ee01220h.
    Sponsors
    A.M., H.K., and P.B. thank the German Federal Ministry of Education and Research (BMBF) for financial support in the frame of joint project LOTsE. P.Q., M.K.N., S.M.Z., and M.G. acknowledge financial contribution from Greatcell Solar SA, Epalinges, Switzerland, the King Abdullah University of Science and Technology (KAUST, Award no. KUS-C1-015-21), the European Community's Seventh Framework Programme "CE-Mesolight" EPFL ECR advanced grant agreement no. 247404. M.K.N. thanks the Global Research Laboratory (GRL) Program, Korea, and World Class University programs (Photovoltaic Materials, Department of Material Chemistry, Korea University) funded by the Ministry of Education, Science and Technology through the National Research Foundation of Korea (no. R31-2008-000-10035-0). The authors thank Dr Peng Gao for the synthesis of CH<INF>3</INF>NH<INF>3</INF>I and Dr Nicolas Tetreault for the Cross-sectional SEM measurement.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Energy & Environmental Science
    DOI
    10.1039/c4ee01220h
    ae974a485f413a2113503eed53cd6c53
    10.1039/c4ee01220h
    Scopus Count
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