Shape-controlled tio2 nanomaterials-based hybrid solid-state electrolytes for solar energy conversion with a mesoporous carbon electrocatalyst

Seung Man Lim, Juyoung Moon, Uoon Chul Baek, Jae Yeon Lee, Youngjin Chae, Jung Tae Park

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Abstract

One-dimensional (1D) titanium dioxide (TiO2) is prepared by hydrothermal method and incorporated as nanofiller into a hybrid polymer matrix of polyethylene glycol (PEG) and employed as a solid-electrolyte in dye-sensitized solar cells (DSSCs). Mesoporous carbon electrocatalyst with a high surface area is obtained by the carbonization of the PVDC-g-POEM double comb copolymer. The 1D TiO2 nanofiller is found to increase the photoelectrochemical performance. As a result, for the mesoporous carbon-based DSSCs, 1D TiO2 hybrid solid-state electrolyte yielded the highest efficiencies, with 6.1% under 1 sun illumination, in comparison with the efficiencies of 3.9% for quasi solid-state electrolyte and 4.8% for commercial TiO2 hybrid solid-state electrolyte, respectively. The excellent photovoltaic performance is attributed to the improved ion diffusion, scattering effect, effective path for redox couple transfer, and sufficient penetration of 1D TiO2 hybrid solid-state electrolyte into the electrode, which results in improved light-harvesting, enhanced electron transport, decreased charge recombination, and decreased resistance at the electrode/electrolyte interface.

Original languageEnglish
Article number913
JournalNanomaterials
Volume11
Issue number4
DOIs
Publication statusPublished - 2021

Keywords

  • Dye-sensitized solar cell (DSSC)
  • Mesoporous carbon
  • One-dimensional (1D)
  • Photoelectrochemical
  • Solid-state electrolyte
  • Titanium dioxide (TiO )

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