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Enhancement of the photoelectric performance of dye-sensitized solar cells by using a CaCO3-coated TiO2 nanoparticle film as an electrode |
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| Authors: | Sangwook Lee Jin Young Kim Kug Sun Hong Hyun Suk Jung Jung-Kun Lee Hyunho Shin |
| Affiliation: | aSchool of Materials Science and Engineering, Seoul National University, San 56-1, Shillim-dong, Kwanak-gu, Seoul 151-744, South Korea;bMaterials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;cDepartment of Ceramics Engineering, Kangnung National University, Kangnung, 210-702, South Korea |
| Abstract: | Core-shell-type nanoparticles with TiO2 cores and CaCO3 shells were applied as the electrode of dye-sensitized solar cells. The performance of the cell was significantly improved (as high as 26.7%) compared to the case when un-coated TiO2 particle film was used as electrode. The improved energy conversion efficiency has been ascribed to (i) enhanced dye adsorption due to the high isoelectric point of the overlayer, and (ii) the prevention of the back electron transfer by the insulating nature of the overlayer. |
| Keywords: | TiO2 CaCO3 Dye-sensitized solar cell Iso-electric point Blocking effect |
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