Liu, Peng Wang, Linqin Karlsson, Karl Martin Hao, Yan Gao, Jiajia Xu, Bo Boschloo, Gerrit Sun, Licheng Kloo, Lars Molecular Engineering of D−π–A Type of Blue-Colored Dyes for Highly Efficient Solid-State Dye-Sensitized Solar Cells through Co-Sensitization A novel blue-colored organic donor-π-acceptor sensitizer, the so-called MKA16 dye, has been employed to construct solid-state dye-sensitized solar cells (ssDSSCs). Using 2,2′,7-,7′-tetrakis­(<i>N</i>,<i>N</i>-di-<i>p</i>-methoxyphenyl-amine) 9,9′-spirobifuorene (Spiro-OMeTAD) as hole-transport material, a good conversion efficiency of 5.8% was recorded for cells based on the MKA16 dye and a high photovoltage of 840 mV in comparison with 5.6% efficiency using the known (Dyenamo Blue) dye. By co-sensitization using the orange-colored D35 dye and MKA16 together, the solid-state solar cells showed an excellent efficiency of 7.5%, with a high photocurrent of 12.41 mA cm<sup>–2</sup> and open-circuit voltage of 850 mV. The results show that the photocurrent of ssDSSCs can be significantly improved by co-sensitization mainly attributed to the wider light absorption range contributing to the photocurrent. In addition, results from photo-induced absorption spectroscopy show that the dye regeneration is efficient in co-sensitized solar cells. The current results possible routes of improving the design of aesthetic and highly efficient ssDSSCs. MKA 16;results show;open-circuit voltage;hole-transport material;dye regeneration;novel blue-colored;donor -π-acceptor sensitizer;MKA 16 dye;850 mV;Molecular Engineering;Dyenamo Blue;ssDSSC;Blue-Colored Dyes;light absorption range;Efficient Solid-State Dye-Sensitized Solar Cells;conversion efficiency;photo-induced absorption spectroscopy show;photocurrent;co-sensitization;orange-colored D 35 dye;840 mV 2018-09-27
    https://acs.figshare.com/articles/journal_contribution/Molecular_Engineering_of_D_A_Type_of_Blue-Colored_Dyes_for_Highly_Efficient_Solid-State_Dye-Sensitized_Solar_Cells_through_Co-Sensitization/7200908
10.1021/acsami.8b11405.s001