One-dimensional SnO2 nanotube solid-state electrolyte for fast electron transport and high light harvesting in solar energy conversion

Jeong Min Lim, Juyoung Moon, Jong Hak Kim, Chang Oh Lee, Won Seok Chi, Jung Tae Park

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3 Citations (Scopus)


We incorporated one-dimensional SnO2 hollow nanotubes (1DTONT) into a quasi-solid-state nanogel polymer electrolyte to produce a highly efficient solid-state electrolyte for solid-state dye-sensitized solar cells (ssDSSCs). The concentration of 1DTONT in the solid-state electrolyte was systematically controlled to understand its effect on solar cell performance and stability. The addition of 1DTONT increases electrolyte viscosity, resulting in a solid-state electrolyte. Although the 1DTONT reduces ion mobility due to enhanced viscosity, its oriented structure with a high aspect ratio increases electron transport. Thus, ssDSSCs incorporated with solid-state 9 wt% 1DTONT electrolyte (ss-9 wt% 1DTONT) display lower charge-transfer resistance than those incorporated with quasi-solid-state nanogel polymer electrolyte. Additionally, 1DTONTs possess light scattering characteristics. Their large particle size distribution (from a few hundred nanometers to a few micrometers) and hollow structure result in multiple scattering opportunities. This feature allows 1DTONTs in solid-state electrolytes to form a thin light-scattering layer (~1 μm) on the TiO2 photoanode. Therefore, ssDSSCs with ss-9 wt% 1DTONT electrolyte exhibit low transmittance and high light reflectance, producing high incident photon-to-current efficiency (IPCE) values over the wavelength range of interest. Overall, ssDSSCs with ss-9 wt% 1DTONT electrolyte exhibit a solar energy conversion efficiency of ~5.8% due to enhanced current density resulting from improved electron transport and light harvesting.

Original languageEnglish
Article number115584
JournalSolid State Ionics
Publication statusPublished - 2021 May

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2019R1C1C1010283, NRF-2020R1F1A1075098 and NRF-2017R1D1A1B06028030).

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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