Zinc Porphyrins with a Pyridine‐Ring‐Anchoring Group for Dye‐Sensitized Solar Cells

Abstract

Anchoring groups are extremely important in controlling the performance of dye-sensitized solar cells (DSCs). The design and characterization of sensitizers with new anchoring groups, in particular non-carboxylic acid groups, has become a recent focus of DSC research. Herein, new donor-π-acceptor zinc-porphyrin dyes with a pyridine ring as an anchoring group have been designed and synthesized for applications in DSCs. Photophysical and electrochemical investigations demonstrated that the pyridine ring worked effectively as an anchoring group for the porphyrin sensitizers. DSCs that were based on these new porphyrins showed an overall power-conversion efficiency of about 4.0 % under full sunlight (AM 1.5G, 100 mW cm(-2)).

Synthesis, spectral and electrochemical properties of pyrimidine-containing dyes as photosensitizers for dye-sensitized solar cells

“…In particular, the incorporation of the additional phenyl (compounds 6b and 8b) or thienyl moieties (compound 6c and 8c) leads to reduction of the fluorescence quantum yields (Table 1, disappeared and a new strong band appeared at around 1593-1599 cm -1 , which can be assigned to pyrimidyl groups coordinated to the Lewis acid sites on the TiO 2 surface. These results are in good agreement with a similar data for the pyridyl anchoring group [12][13][14][15][16][17][18].…”

Synthesis, Photophysical and Redox Properties of the D–π–A Type Pyrimidine Dyes Bearing the 9-Phenyl-9H-Carbazole Moiety

“…When the dyes 3a-c were adsorbed on the TiO 2 surface, the stretching hands observed at 1517-1537 and 1569-1573 cm −1 have disappeared and a new strong band appeared at 1599-1600 cm −1 , which can be assigned to pyrimidinyl groups coordinated to the Lewis acid sites on the TiO 2 surface. These consequences are in good agreement with a similar behavior of the pyridinyl anchoring group [44][45][46][47][48][49][50] and with our previous results for the pyrimidinyl anchoring group [13].…”

Molecular engineering of D-A-π-A dyes with 2-(1,1-dicyanomethylene)rhodanine as an electron-accepting and anchoring group for dye-sensitized solar cells

“…Alternatively, a number of new acceptors have been designed and developed, such as pyridine [11][12][13],cationiciso-quinoline [14], pyridine-N-oxide [15] and alkoxysilylgroups [7] .…”