| Summary: | 碩士 === 國立中央大學 === 化學學系 === 101 === Renewable energy is an important and inexhaustible subject partly due to the global warming issue. Solar energy is one of the most promising source of energy. Dye-sensitized solar cells (DSSCs) are a new generation solar cell under widely studied. Dye molecule is the source for the photocurrent of DSSC and affect the conversion efficiency and stability of the corresponding devices. Ruthenium dye for DSSC usually contains two bipyridine bidentates and two thiocyanate (NCS) monodentate ligands to form a hexacoordinated complex. However the monodentates have low stability. In this thesis we focus on the synthesis of a new bidentate ancillary ligand, named Ligand-30. Then use Ligand-30 to synthesis CYC-B30 using a “Two-step” synthesis method. CYC-B30 has three spatial isomers: CYC-B30(P1), CYC-B30(P2) and CYC-B30(P3) with a respective yield of 4.4 %, 12.3 % and 6.3 %. The max (the corresponding absorption coefficient) of these three dye molecules were 526 nm (2.73x104 M-1 cm-1), 535 nm (3.69 x 104 M-1 cm-1) and 534 nm (3.41 x 104 M-1 cm-1), respectively. DSSCs based on CYC-B30(P1), CYC-B30(P2) and CYC-B30(P3) under AM 1.5 light source achieve the conversion efficiency of 3.01 %, 4.02 % and 4.68 %, respectively CYC-B30(P2) has the highest yield among three isomers, it was used to compare with CYC-B29(P2) dye to understand the relationship between the structure and photovoltaic performance of Ru based sensitizers.
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