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Improvement of Light-Harvesting Efficiency of TiO2 Granules Through Chemical Interconnection of Nanoparticles by Adding TEOT to Spray Solution
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  • Journal title : Korean Chemical Engineering Research
  • Volume 53, Issue 5,  2015, pp.632-637
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2015.53.5.632
 Title & Authors
Improvement of Light-Harvesting Efficiency of TiO2 Granules Through Chemical Interconnection of Nanoparticles by Adding TEOT to Spray Solution
Lim, Mi Ja; Song, Shin Ae; Kang, Yun Chan; So, Won-Wook; Jung, Kyeong Youl;
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Mesoporous granules were prepared by spray pyrolysis using nano-sized titania particles which were synthesized by a hydrothermal method, and they were evaluated as the photoanode of dye-sensitized solar cells. To enhance the cell efficiency, nanoparticles within granules were chemically interconnected by adding titanium ethoxide (TEOT) to colloidal spray solution. The resulting titania particles had anatase phase without forming rutile. granules obtained showed about 400 nm in size, the specific surface area of , and average pore size of 13-17 nm. The chemical modification of granules by adding TEOT initially to the colloidal spray solution was proved to be an effective way in terms of increasing both the light scattering within photoanode and the lifetimes of photo-excited electrons. Consequently, the light-harvesting efficiency of TEOT-modified granules (${\eta}
Titania Granules;Chemical Modification;DSSC;Spray Pyrolysis;Electron Lifetimes;
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