Inorganic salt templated porous TiO2 photoelectrode for solid-state dye-sensitized solar cells
RSC Advances Pub Date: 2015-12-16 DOI: 10.1039/C5RA22324E
Abstract
TiO2 photoelectrodes with channels (or pores) are prepared by using an inorganic salt (NaHCO3) as a template. NaHCO3 doped TiO2 slurries deposited on a compacted TiO2 film are heated at 150 °C, which releases CO2 gas and water vapour, thus forming channels (or pores) inside a TiO2 light-scattering photoelectrode. These channels (pores) improve the penetration degree of solid-state electrolytes into the TiO2 photoelectrode and enhance the photovoltaic efficiency of resulting DSSCs (dye sensitized solar cells). With a channel (pore) size of ～500 nm diameter, an ionic liquid plastic crystal, 5-azoniaspiro[4.4]nonane bis(trifluoromethanesulfonyl)imide (N44TFSI), shows power conversion efficiencies of 6.1% and 5.4% under 1.5 solar spectrum illuminations at 50 and 100 mW cm?2, respectively.
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Journal Name：RSC Advances
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CAS no.: 89640-58-4
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