Controllable hydrothermal synthesis of nanocrystal TiO_2 particles and their use in dye-sensitized solar cells  

作　　者：LAN Zhang WU JiHuai LIN JianMing HUANG MiaoLiang 

机构地区：[1]Engineering Research Center of Environment-Friendly Functional Materials,Ministry of Education,Key Laboratory of Functional Materials for Fujian Higher Education Institute of Materials Physical Chemistry,Huaqiao University,Quanzhou 362021,China

出　　处：《Science China Chemistry》2012年第7期1308-1313,共6页中国科学（化学英文版）

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)

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%.

关 键 词：dye-sensitized solar cell hydrothermal synthesis nanocrystal TiO2 photovoltaic performance scattering layer 

分 类 号：O614.411[理学—无机化学] TM914.4[理学—化学]