| 초록 |
PS-b-P2VP block copolymer was synthesized via anionic polymerization and directly combined with preformed TiO2 nanocrystals to form crack-free, micron-thick, worm-like organized TiO2 films. The characterizations by XRD, SEM, and GI-SAXS analyses revealed that the prepared TiO2 have an organized morphology and good interconnectivity. Additional experiments about the morphological properties of the TiO2 were performed with various polymer concentration and its relative ratio to TiO2. The TiO2 film synthesized by using high polymer concentration of 6 wt% and a polymer:TiO2 ratio of 1:2 (P6T2 film) showed a well-organized structure with a large specific surface area and smaller mesopores. The solid state dye-sensitized solar cells fabricated with N719 dye and 2.8 μm-thick P6T2 photoanode showed an energy conversion efficiency of 4.0% with the highest Jsc value at 100 mW/cm2. Due to its larger surface area, well-organized pores and good interconnectivity, ssDSSCs with P6T2 photoanode showed much better performance than that of commercial TiO2 paste (2.3%). |
