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    Nanostructured TiO2/CH3NH3PbI3 heterojunction solar cells employing spiro-OMeTAD/Co-complex as hole-transporting material

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    Type
    Article
    Authors
    Noh, Jun Hong
    Jeon, Nam Joong
    Choi, Yong Chan
    Nazeeruddin, Md. K.
    Grätzel, Michael
    Seok, Sang Il
    Date
    2013
    Permanent link to this record
    http://hdl.handle.net/10754/598956
    
    Metadata
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    Abstract
    For using 2,2′,7,7′-tetrakis(N,N′-di-p- methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) as a hole conductor in solar cells, it is necessary to improve its charge-transport properties through electrochemical doping. With the aim of fabricating efficient mesoscopic TiO2/CH3NH3PbI3 heterojunction solar cells, we used tris[2-(1H-pyrazol-1-yl)-4-tert- butylpyridine)cobalt(iii) tris(bis(trifluoromethylsulfonyl) imide)] (FK209) as a p-dopant for spiro-OMeTAD. The mixture of spiro-OMeTAD, FK209, lithium bis(trifluoromethylsulfonyl)imide (Li-TFSI), and 4-tert-butylpyridine (TBP) exhibited significantly higher performance than mixtures of pristine spiro-OMeTAD, spiro-OMeTAD, and FK209, and spiro-OMeTAD, Li-TFSI, and TBP. Such a synergistic effect between the Co-complex and Li-TFSI in conjunction with spiro-OMeTAD effectively improved the power conversion efficiency (PCE) of the fabricated solar cells. As a result, we achieved PCE of 10.4%, measured under standard solar conditions (AM 1.5G, 100 mW cm-2). © 2013 The Royal Society of Chemistry.
    Citation
    Noh JH, Jeon NJ, Choi YC, Nazeeruddin MK, Grätzel M, et al. (2013) Nanostructured TiO2/CH3NH3PbI3 heterojunction solar cells employing spiro-OMeTAD/Co-complex as hole-transporting material. Journal of Materials Chemistry A 1: 11842. Available: http://dx.doi.org/10.1039/c3ta12681a.
    Sponsors
    This study was supported by the Global Research Laboratory (GRL) Program and the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education, Science and Technology of Korea, and by a grant from the KRICT 2020 Program for Future Technology of the Korea Research Institute of Chemical Technology (KRICT), Republic of Korea. MKN thanks the Center for Advanced Molecular Photovoltaics (Award No KUS-C1-015- 21). MG thanks the "CE-Mesolight" EPFL ECR advanced grant agreement No. 247404, and the King Abdullah University of Science and Technology (KAUST) for financial support.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Journal of Materials Chemistry A
    DOI
    10.1039/c3ta12681a
    ae974a485f413a2113503eed53cd6c53
    10.1039/c3ta12681a
    Scopus Count
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