Direct Assembly of Preformed Nanoparticles and Graft Copolymer for the Fabrication of Micrometer‐thick, Organized TiO₂ Films: High Efficiency Solid‐state Dye‐sensitized Solar Cells

Abstract

Solid-state dye-sensitized solar cell with 7.1% efficiency at 100 mW/cm(2) is reported, one of the highest observed for N719 dye. Excellent performance was achieved via a graft copolymer-templated, organized mesoporous TiO(2) film with a large surface area using spindle-shaped, preformed TiO(2) nanoparticles and solid polymer electrolyte.

Maximizing omnidirectional light harvesting in metal oxide hyperbranched array architectures

“…More recently, the synthesis of well-organized nanostructures such as the organized mesoporous TiO 2 films prepared using graft copolymer nanostructural polymers [6][7][8][9][10] , and some wellaligned one-dimensional (1D) nanostructures, such as nanowires (NWs), nanotubes, nanorods (NRs) and nanofibres, have stimulated intense research interest and attention owing to their potential advantages of rapid charge transport and efficient charge collection by means of providing short electrical pathways for rapid transfer and thus efficient collection of photo-generated carriers throughout the device [11][12][13][14][15][16][17] . It is well known that the key to high solar-to-electric efficiency is surface area.…”

Hierarchical growth of TiO2 nanosheets on anodic ZnO nanowires for high efficiency dye-sensitized solar cells

“…The organized mesoporous (OM) TiO 2 was constructed on the blocking layer with an amphiphilic graft copolymer, PVC-g-POEM, as the sacrificing template, according to our previously reported literature [34] 4, 8 and 12 wt % of ZNW or ZNW@TNS powder was dispersed in 2 ml of THF under ultrasonication and 0.2 g of PVC-g-POEM copolymer was sequentially dissolved in the above solution overnight. Separately, hydrophilic TiO 2 nanoparticles (pre-TiO 2 ) were prepared by adding 1.5 ml of TiCl 4 and 50 ml of benzyl alcohol in 10 ml of toluene and heating at 70 C for 15 h. The pre-TiO 2 powder was collected via centrifugation at 12,000 rpm for 30 min.…”

Amphiphilic block-graft copolymer templates for organized mesoporous TiO2 films in dye-sensitized solar cells

“…Separately, Pre-TiO 2 was prepared according to our previous reports [9,23]. In brief, 1.5 ml of TiCl 4 was slowly dropped into 10 ml of toluene with vigorous stirring at room temperature for 10 min.…”