Hollow TiO2 Hemispheres Obtained by Colloidal Templating for Application in Dye-Sensitized Solar Cells


  • S.-C. Y. and D.-J. Y. contributed equally to this work. H. L. acknowledges the financial support of this work by the KIST internal project under contract 2E20000. The authors thank Dr. Dong Young Kim for the IPCE measurement and Dr. Nam.-Gyu Park for the use of the solar simulator and EIS measurement. I.-D. Kim appreciates Prof. Avner Rothschild at the Technion Institute in Israel for the helpful discussions. Supporting Information is available online from Wiley InterScience or from the authors.


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Hollow TiO2hemispheres for application in dye-sensitized solar cells are prepared by means of rf-sputtering onto colloidal templated substrates. After removing the organic templates by thermal decomposition, quasi-ordered networks of hollow TiO2 hemispheres were formed. This approach should open up new opportunities for processing material architectures with high surface activity and effective charge transport for high performance photovoltaic and photoelectrochemical cells.