Abstract
Four heteroleptic dinuclear ruthenium(II) complexes bridged with 5-(2-[2,2′-bipyridin]-5-ylethynyl)-2,2′-bipyridine (bpy-ac-bpy) ligand were prepared and ligated to four different α-diimine ligands, [TBA]2[Ru2(L)2(BL)(NCS)4] [where L = 4,4′-dicarboxy-2,2′-bipyridine (dcbpy), 4,4′-bis(E-carboxyvinyl)-2,2′-bipyridine (dcvbpy), 4,7-dicarboxy-1,10-phenanthroline (dcphen), or 4,7-bis(E-carboxyvinyl)-1,10-phenanthroline (dcvphen), BL = bridging ligand]. Their physical and photovoltaic properties were investigated. Among the dye-sensitized solar cells (DSSCs) fabricated with the newly prepared four heteroleptic dinuclear ruthenium(II) complexes, a DSSC fabricated with the heteroleptic dinuclear ruthenium(II) complexes bridged with bpy-ac-bpy and ligated to dcvphen exhibited a reasonable power conversion efficiency (η) of 2.33%, which is close to that of the N719-sensitized solar cell (3.44%) under the same cell fabrication and measuring conditions.
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Acknowledgements
This study was supported by Kwangwoon University in 2016 (B.H. Kim) and the Grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MEST) (2014R1A2A1A10054643) (B. Park).
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Choi, Y.R., Lee, W., Yun, S.H. et al. Dinuclear Ru(II) complexes bridged with 5-(2-[2,2′-bipyridin]-5-ylethynyl)-2,2′-bipyridine ligand and ligated to ancillary α-diimine ligand: synthesis and application to dye-sensitized solar cells. Monatsh Chem 148, 2051–2059 (2017). https://doi.org/10.1007/s00706-017-2027-4
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DOI: https://doi.org/10.1007/s00706-017-2027-4