摘要
A simple method for the controllable hydrothermal synthesis of nanocrystalline anatase TiO2(nc-TiO2) particles involving the selection of suitable organic alkali peptizing agents is reported.A dye-sensitized solar cell(DSSC) with square-like nc-TiO2 particles with side lengths about 8-13 nm-prepared using tetraethylammonium hydroxide(TEAOH)-in the photoelectrode showed higher photovoltaic performance than two other DSSCs with square-like nc-TiO2 particles with side lengths about 7-10 nm-prepared using tetrabutylammonium hydroxide-or elongated nc-TiO2 particles with lengths about 18-35 nm and width about 10 18 nm-prepared using tetramethylammonium hydroxide(TMAOH)-in the photoelectrodes.When a scattering layer prepared from sub-micron size spheres or cone-like nc-TiO2 particles-synthesized using a higher concentration of TMAOH-was added on top of the photoelectrode fabricated from nc-TiO2 synthesized with TEAOH,the energy conversion efficiency of the DSSC was markedly increased from 6.77% to 8.18%.
A simple method for the controllable hydrothermal synthesis of nanocrystalline anatase TiO2 （nc-TiO2） particles involving the selection of suitable organic alkali peptizing agents is reported. A dye-sensitized solar cell （DSSC） with square-like nc-TiO2 particles with side lengths about 8-13 nm--prepared using tetraethylammonium hydroxide （TEAOH）--in the photoelectrode showed higher photovoltaic performance than two other DSSCs with square-like nc-TiO2 particles with side lengths about 7-10 nm--prepared using tetrabutylammonium hydroxide--or elongated nc-TiO2 particles with lengths about 18-35 nm and width about 10-18 nm--prepared using tetramethylammonium hydroxide （TMAOH）--in the photoelectrodes. When a scat- tering layer prepared from sub-micron size spheres or cone-like nc-TiO2 particles--synthesized using a higher concentration of TMAOH--was added on top of the photoelectrode fabricated from nc-TiO2 synthesized with TEAOH, the energy conversion efficiency of the DSSC was markedly increased from 6.77% to 8.18%.
基金
supported by the National High Technology Research and Development of China (863 Program,2009AA03Z217)
the National Natural Science Foundation of China (90922028,51002053)
the Natural Science Foundation of Fujian Province (2010J05115)
the Fundamental Research Funds for the Central Universities (JB-SJ1001)
