| 초록 |
Solid-state polymerization (SSP) of a thermally active monomer, 2,5-dibromo-3,4-propylenedioxythiophene (DBProDOT), was achieved at room temperature to produce a conductive polymer, poly(3,4-propylenedioxythiophene) (PProDOT). Solid-state polymerized PProDOT had greater electrical conductivity due to self-doped state with Br3-. Crystallographic studies revealed a shorter interplane distance between DBProDOT molecules in the crystal, which was responsible for polymerization at low temperature. DBProDOT penetrated to the mesoporous TiO2 was solid-state polymerized to produce a hole transporting material for I2-free solid-state dye-sensitized solar cells (ssDSSCs). Nanopatterning provides facile process to well-arrayed mesoporous TiO2 films at low cost. The energy conversion efficiency (3.5%) and long-term stability (1,500 h) were attributed to the high stability of PProDOT with high conductivity, resulting in reduced interfacial resistance and enhanced electron lifetime. |
