Abstract
ABSTRACTA new conjugated ionic polymer, poly(N-bromo-2-ethynylpyridinium bromide) (PBEPB) was applied for a quasi-solid-state dye-sensitized solar cells (DSSCs) and compared the device performance with poly(N-bromo-2-ethynylpyridinium iodide) (PBEPI) as reference cell. The polymer was prepared by the spontaneous polymerization of 2-ethynylpyridine using bromine. The PBEPB was completely soluble in such organic solvents as DMF, DMSO and NMP etc. The photoluminescence peaks of PBEPB was observed at 407 nm and 516 nm, which corresponds to the photon energy of 3.15 eV and 2.41 eV, respectively. Quasi-solid-state DSSCs with a SnO2:F/TiO2/D719 dye/solid-state electrolyte/Pt device was fabricated with an ionic conjugated polymer with pyridinium substituents, which shows the power conversion efficiency (PCE) of 5.95%.
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