In situ topological transformation of hierarchical TiO2 hollow nanobricks as efficient scattering layer for dye-sensitized solar cells
Abstract
NH4TiOF3 nanobricks are prepared by a one-step hydrothermal route and then are made into paste. The NH4TiOF3 are in situ topologically transformed into anatase TiO2 hollow nanobricks via a boric acid treatment process after the paste is screen-printed onto FTO glass as a scattering layer for DSSCs. The cell with scattering layer exhibits a high photovoltaic conversion efficiency of 8.09%, which is 24.8% higher than that of the cell composed of bare nanocrystalline TiO2 (6.48%). After a series of characterization, the higher specific surface area and the superior light-scattering ability of hierarchical TiO2 hollow nanobricks are proved to be the main facts for the enhanced efficiency.
- Publication:
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Chemical Physics Letters
- Pub Date:
- January 2020
- DOI:
- 10.1016/j.cplett.2019.136996
- Bibcode:
- 2020CPL...73936996X
- Keywords:
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- Topological transformation;
- Dye-sensitized solar cells;
- Scattering layer;
- TiO<SUB>2</SUB> nanobricks