One bipyridine and triple advantages: tailoring ancillary ligands in ruthenium complexes for efficient sensitization in dye solar cells

[摘要]：Four new ruthenium bipyridyl complexes denoted as MC103-MC106, with novel unsymmetrical bipyridines as ancillary ligands have been successfully synthesized as efficient sensitizers for application in dye-sensitized solar cells (DSC). The spectral, electrochemical and photovoltaic properties of the new sensitizers have been investigated. Alkyl thiophene/alkyl bithiophene and trialkyl phenyl as substituents on ancillary ligands improved the spectral properties and hence better efficiencies of DSCs are achieved. The higher efficiencies of the new sensitizers obtained are 9.56%, 9.58%, 8.34% and 8.32%, respectively, compared to 7.2% for the standard N719 sensitizer fabricated and evaluated under similar conditions.

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