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    Tris(2-(1 H -pyrazol-1-yl)pyridine)cobalt(III) as p-Type Dopant for Organic Semiconductors and Its Application in Highly Efficient Solid-State Dye-Sensitized Solar Cells

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    Type
    Article
    Authors
    Burschka, Julian
    Dualeh, Amalie
    Kessler, Florian
    Baranoff, Etienne
    Cevey-Ha, Ngoc-Lê
    Yi, Chenyi
    Nazeeruddin, Mohammad K.
    Grätzel, Michael
    KAUST Grant Number
    KUS-C1-015- 21
    Date
    2011-11-16
    Permanent link to this record
    http://hdl.handle.net/10754/600087
    
    Metadata
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    Abstract
    Chemical doping is an important strategy to alter the charge-transport properties of both molecular and polymeric organic semiconductors that find widespread application in organic electronic devices. We report on the use of a new class of Co(III) complexes as p-type dopants for triarylamine-based hole conductors such as spiro-MeOTAD and their application in solid-state dye-sensitized solar cells (ssDSCs). We show that the proposed compounds fulfill the requirements for this application and that the discussed strategy is promising for tuning the conductivity of spiro-MeOTAD in ssDSCs, without having to rely on the commonly employed photo-doping. By using a recently developed high molar extinction coefficient organic D-π-A sensitizer and p-doped spiro-MeOTAD as hole conductor, we achieved a record power conversion efficiency of 7.2%, measured under standard solar conditions (AM1.5G, 100 mW cm -2). We expect these promising new dopants to find widespread applications in organic electronics in general and photovoltaics in particular. © 2011 American Chemical Society.
    Citation
    Burschka J, Dualeh A, Kessler F, Baranoff E, Cevey-Ha N-L, et al. (2011) Tris(2-(1 H -pyrazol-1-yl)pyridine)cobalt(III) as p-Type Dopant for Organic Semiconductors and Its Application in Highly Efficient Solid-State Dye-Sensitized Solar Cells . Journal of the American Chemical Society 133: 18042–18045. Available: http://dx.doi.org/10.1021/ja207367t.
    Sponsors
    The authors thank Dr. Hoi Nok Tsao for help with conductivity measurements and Prof. Peng Wang for providing the C220 sensitizer. This publication is partially based on work supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1-015- 21), made by King Abdullah University of Science and Technology (KAUST). M.K.N. thanks the WCU (the Ministry of Education and Science) Program (No. R31-2008-000-10035-0).
    Publisher
    American Chemical Society (ACS)
    Journal
    Journal of the American Chemical Society
    DOI
    10.1021/ja207367t
    PubMed ID
    21972850
    ae974a485f413a2113503eed53cd6c53
    10.1021/ja207367t
    Scopus Count
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