| DSSCs(dye-sensitized solar cells) have attracted many researchers′interesting for their unique advantages: high solar-to-electricity conversion efficiency in theory, simple preparation technologies and low cost. Polymeric metal complex are excellent dyes used to DSSCs for their unique structure. At first, polymeric metal complex could expandπ-conjugation of structure, it is useful to improve the transmission of electron and hole; the second, polymeric metal complex could control the energy gap and transmission of elector by coordination bond and d-πbond between metal and ligand. So two novel polymeric metal complexes for DSSCs based on fluorene, thiophene, 8-Hydroxyquinoline (8-HQ), 2-(2'-pyridyl) benzimidazole, 1, 10-Phenathroline and Zn (Ⅱ), Cd (Ⅱ) had been synthesized. The structure of these polymeric metal complexes had been characterized by 1H NMR, FT-IR and Element analysis. Furthermore, these polymeric metal complexes finally investigated as dyes of dye-sensitized solar cells (DSSCs). The main study as follows:1. In this paper 2,5-dibromo-3-[2-(8-hydroxyquinoline)-vinyl]thiophene (D8QPT) had been synthesized successfully first by thiophene and 8-Hydroxyquinoline. Then D8QTP-Zn and D8QTP-Cd had been synthesized through the reaction between D8QPT, 1, 10-Phenathroline and Zn (Ⅱ), Cd (Ⅱ) . Finally, new branch chain polymeric metal complexes (PFT-Zn, PFT-Cd) had been synthesized by D8QTP-Zn, D8QTP-Cd and 9,9-diocty l-2,7-dibrormylfluorene. The stucrute of these novel materials had been characterized by 1H NMR, FT-IR and Element analysis, then their thermal stability and optoelectronic property also had been studied by UV-vis absorption spectroscopy, Photoluminescence spectroscopy, TGA, GPC, DSC and Cyclic voltammetry. The result shows that these materials have good thermal stabilityt and low energy gap. These two polymeric metal complex exhibit a maximum solar-to-electricity conversion efficiency (η) of 3.01% and 3.37% under simulated AM 1.5G solar irradiation (90-95mW/cm~2).2. In this paper [2-(2′-pyridyl)benzimidazolyl]-3-methylthiophene(Bmtp) had been synthesized by 3-methylthiophene and [2-(2′- pyridyl)benzimidazolyl] first, then a novel main chain polymeric metal complex (Bmtp-Zn) based on Bmtp and Zn (Ⅱ) also had been synthesized successfully. The structure of Bmtp-Zn had been characterized by 1H NMR, FT-IR, and its thermal stability and optoelectronic property also had been studied by UV-vis absorption spectroscopy, Photoluminescence spectroscopy, TGA, GPC, DSC and Cyclic voltammetry. This polymeric metal conplex exhibits a maximum solar-to-electricity conversion efficiency (η) of 1.88% under simulated AM 1.5G solar irradiation (90-95mW/cm~2).
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