Solid-State Dye-Sensitized Solar Cells Using a Novel Class of Ullazine Dyes as Sensitizers

Authors

  • Amalie Dualeh,

    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, CH–1020 Lausanne, Switzerland
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  • Robin Humphry-Baker,

    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, CH–1020 Lausanne, Switzerland
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  • Jared Heath Delcamp,

    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, CH–1020 Lausanne, Switzerland
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  • Mohammad Khaja Nazeeruddin,

    Corresponding author
    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, CH–1020 Lausanne, Switzerland
    • École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, CH–1020 Lausanne, Switzerland.
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  • Michael Grätzel

    Corresponding author
    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, CH–1020 Lausanne, Switzerland
    • École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, CH–1020 Lausanne, Switzerland.
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Abstract

Here we present the photovoltaic performance of solid-state dye-sensitized solar cells (DSCs) using a series of ullazine-based metal-free organic sensitizers and spiro-MeOTAD as a hole-transport material. A maximum of 4.95% power conversion efficiency measured under standard AM 1.5G illumination (100 mW cm−2) was achieved with the best performing ullazine dye, and was further improved to 5.40% through co-sensitization with the triphenylamine-based organic sensitizer, D35. This study investigates the effect of the molecular structure of the ullazine sensitizer on the performance in solid-state DSCs.

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