Abstract
A high-energy conversion efficiency of 8.2% at 100 mW cm-2 is reported, one of the highest values for N719-based, solid-state, dye-sensitized solar cells (ssDSSCs). The solar cells are based on hierarchical double-shell nanostructures consisting of inner SnO2 hollow spheres (SHS) surrounded by outer TiO2 nanosheets (TNSs). Deposition of the TNS on the SHS outer surface is performed via solvothermal reactions in order to generate a double-shell SHS@TNS nanostructure that provides a large surface area and suppresses recombination of photogenerated electrons. An organized mesoporous (OM)-TiO2 film with high porosity, large pores, and good interconnectivity is also prepared via a sol-gel process using a poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) graft copolymer template. This film is utilized as a matrix to disperse the double-shell nanostructures. Such nanostructures provide good pore-filling for solid polymer electrolytes, faster electron transfer, and enhanced light scattering, as confirmed by reflectance spectroscopy, incident photon-to-electron conversion efficiency (IPCE), and intensity-modulated photocurrent spectroscopy (IMPS)/intensity-modulated photovoltage spectroscopy (IMVS). Hierarchical double-shell nanostructures consisting of TiO2 nanosheets on SnO 2 hollow spheres are prepared to provide large surface area, excellent electron transport, and improved light scattering. The resulting solid-state dye-sensitized solar cells show enhanced efficiency up to 8.2% at 100 mW cm-2, one of the highest values observed for N719 dye.
| Original language | English |
|---|---|
| Pages (from-to) | 5037-5044 |
| Number of pages | 8 |
| Journal | Advanced Functional Materials |
| Volume | 24 |
| Issue number | 32 |
| DOIs | |
| Publication status | Published - 2014 Aug 27 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
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Hierarchical double-shell nanostructures of TiO2 nanosheets on SnO2 hollow spheres for high-efficiency, solid-state, dye-sensitized solar cells. / Ahn, Sung Hoon; Kim, Dong Jun; Chi, Won Seok; Kim, Jong Hak.
In: Advanced Functional Materials, Vol. 24, No. 32, 27.08.2014, p. 5037-5044.Research output: Contribution to journal › Article
TY - JOUR
T1 - Hierarchical double-shell nanostructures of TiO2 nanosheets on SnO2 hollow spheres for high-efficiency, solid-state, dye-sensitized solar cells
AU - Ahn, Sung Hoon
AU - Kim, Dong Jun
AU - Chi, Won Seok
AU - Kim, Jong Hak
PY - 2014/8/27
Y1 - 2014/8/27
N2 - A high-energy conversion efficiency of 8.2% at 100 mW cm-2 is reported, one of the highest values for N719-based, solid-state, dye-sensitized solar cells (ssDSSCs). The solar cells are based on hierarchical double-shell nanostructures consisting of inner SnO2 hollow spheres (SHS) surrounded by outer TiO2 nanosheets (TNSs). Deposition of the TNS on the SHS outer surface is performed via solvothermal reactions in order to generate a double-shell SHS@TNS nanostructure that provides a large surface area and suppresses recombination of photogenerated electrons. An organized mesoporous (OM)-TiO2 film with high porosity, large pores, and good interconnectivity is also prepared via a sol-gel process using a poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) graft copolymer template. This film is utilized as a matrix to disperse the double-shell nanostructures. Such nanostructures provide good pore-filling for solid polymer electrolytes, faster electron transfer, and enhanced light scattering, as confirmed by reflectance spectroscopy, incident photon-to-electron conversion efficiency (IPCE), and intensity-modulated photocurrent spectroscopy (IMPS)/intensity-modulated photovoltage spectroscopy (IMVS). Hierarchical double-shell nanostructures consisting of TiO2 nanosheets on SnO 2 hollow spheres are prepared to provide large surface area, excellent electron transport, and improved light scattering. The resulting solid-state dye-sensitized solar cells show enhanced efficiency up to 8.2% at 100 mW cm-2, one of the highest values observed for N719 dye.
AB - A high-energy conversion efficiency of 8.2% at 100 mW cm-2 is reported, one of the highest values for N719-based, solid-state, dye-sensitized solar cells (ssDSSCs). The solar cells are based on hierarchical double-shell nanostructures consisting of inner SnO2 hollow spheres (SHS) surrounded by outer TiO2 nanosheets (TNSs). Deposition of the TNS on the SHS outer surface is performed via solvothermal reactions in order to generate a double-shell SHS@TNS nanostructure that provides a large surface area and suppresses recombination of photogenerated electrons. An organized mesoporous (OM)-TiO2 film with high porosity, large pores, and good interconnectivity is also prepared via a sol-gel process using a poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) graft copolymer template. This film is utilized as a matrix to disperse the double-shell nanostructures. Such nanostructures provide good pore-filling for solid polymer electrolytes, faster electron transfer, and enhanced light scattering, as confirmed by reflectance spectroscopy, incident photon-to-electron conversion efficiency (IPCE), and intensity-modulated photocurrent spectroscopy (IMPS)/intensity-modulated photovoltage spectroscopy (IMVS). Hierarchical double-shell nanostructures consisting of TiO2 nanosheets on SnO 2 hollow spheres are prepared to provide large surface area, excellent electron transport, and improved light scattering. The resulting solid-state dye-sensitized solar cells show enhanced efficiency up to 8.2% at 100 mW cm-2, one of the highest values observed for N719 dye.
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U2 - 10.1002/adfm.201400774
DO - 10.1002/adfm.201400774
M3 - Article
AN - SCOPUS:84906541229
VL - 24
SP - 5037
EP - 5044
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-301X
IS - 32
ER -