Honeycomb-like organized TiO2 photoanodes with dual pores for solid-state dye-sensitized solar cells

Sung Hoon Ahn, Won Seok Chi, Dong Jun Kim, Sung Yeon Heo, Jong Hak Kim

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

A solid-state dye-sensitized solar cell (ssDSSC) with 7.4% efficiency at 100 mW/cm2 is reported. This efficiency is one of the highest observed for N719 dye. High performance is achieved via a honeycomb-like, organized mesoporous TiO2 photoanode with dual pores, high porosity, good interconnectivity, and excellent light scattering properties. The TiO 2 photoanodes are prepared without any TiCl4 treatment via a one-step, direct self-assembly of hydrophilically preformed TiO2 nanocrystals and poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) graft copolymer as a titania source and a structure-directing agent, respectively. Upon controlling the secondary forces between the polymer/TiO2 hybrid and the solvent by varying the amounts of HCl/H2O mixture or toluene, honeycomb-like structures are generated to improve light scattering properties. Such multifunctional nanostructures with dual pores provide good pore-filling of solid polymer electrolyte with large volume, enhanced light harvesting and reduced charge recombination, as confirmed by reflectance spectroscopy, incident photon-to-electron conversion efficiency (IPCE), and electrochemical impedance spectroscopy (EIS) analysis.

Original languageEnglish
Pages (from-to)3901-3908
Number of pages8
JournalAdvanced Functional Materials
Volume23
Issue number31
DOIs
Publication statusPublished - 2013 Aug 19

Fingerprint

Light scattering
Polymers
solar cells
dyes
solid state
porosity
Graft copolymers
Toluene
Electrochemical impedance spectroscopy
Nanocrystals
Self assembly
Electrolytes
Conversion efficiency
Nanostructures
light scattering
Coloring Agents
Photons
Dyes
Titanium
Porosity

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

Cite this

Ahn, Sung Hoon ; Chi, Won Seok ; Kim, Dong Jun ; Heo, Sung Yeon ; Kim, Jong Hak. / Honeycomb-like organized TiO2 photoanodes with dual pores for solid-state dye-sensitized solar cells. In: Advanced Functional Materials. 2013 ; Vol. 23, No. 31. pp. 3901-3908.
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Honeycomb-like organized TiO2 photoanodes with dual pores for solid-state dye-sensitized solar cells. / Ahn, Sung Hoon; Chi, Won Seok; Kim, Dong Jun; Heo, Sung Yeon; Kim, Jong Hak.

In: Advanced Functional Materials, Vol. 23, No. 31, 19.08.2013, p. 3901-3908.

Research output: Contribution to journalArticle

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