The effect of TiO2-coating layer on the performance in nanoporous ZnO-based dye-sensitized solar cells

TiCl4 treatment was used to chemically agglomerate TiO2 primary nano-particles to form a nanostructured powder in size of submicrometer. Nanocrystalline TiO2 coatings were fabricated by vacuum cold spraying at room temperature using the powder and were employed to assemble dye-sensitized solar cells. TiO2 coating of 10-20μm in thickness was deposited successfully on both F-doped tin oxide (FTO) conducting glass and plastic conducting substrate. The assembled solar cell with an FTO conducting glass yielded a short-circuit current density of 9.7 mA/cm2 and an energy conversion efficiency of 3.3%. Using the plastic substrate, the cell efficiency was 1.9%. These results suggest that TiCl4-treated nanocrystalline TiO2 agglomerates can be used to deposit TiO2 coating by vacuum cold spraying at low temperature for flexible dye-sensitized solar cells.

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Effects of TiO2 Coating on WO3 Inverse Opal Photoelectrode for Dye-sensitized Solar Cells

Korean Science Education Society for the Gifted ◽

10.29306/jseg.2019.11.1.14 ◽

2019 ◽

Vol 11 (1) ◽

pp. 14-25

Author(s):

Soon Hyung Kang ◽

Jiwoo Koh ◽

Seoui Kwag ◽

Hyejin Byeun ◽

Inho Lee

Keyword(s):

Solar Cells ◽

Dye Sensitized Solar Cells ◽

Tio2 Coating ◽

Inverse Opal ◽

Dye Sensitized ◽

Sensitized Solar Cells

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Enhancing Performance of SnO2-Based Dye-Sensitized Solar Cells Using ZnO Passivation Layer

International Journal of Photoenergy ◽

10.1155/2016/9087478 ◽

2016 ◽

Vol 2016 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

W. M. N. M. B. Wanninayake ◽

K. Premaratne ◽

R. M. G. R. Rajapakse

Keyword(s):

Solar Cells ◽

Coating Layer ◽

Photovoltaic Performance ◽

Dye Sensitized Solar Cells ◽

Liquid Electrolyte ◽

High Electron ◽

Electron Recombination ◽

Dye Sensitized ◽

Sensitized Solar Cells ◽

Recombination Effect

Although liquid electrolyte based dye-sensitized solar cells (DSCs) have shown higher photovoltaic performance in their class, they still suffer from some practical limitations such as solvent evaporation, leakage, and sealing imperfections. These problems can be circumvented to a certain extent by replacing the liquid electrolytes with quasi-solid-state electrolytes. Even though SnO2shows high election mobility when compared to the semiconductor material commonly used in DSCs, the cell performance of SnO2-based DSCs is considerably low due to high electron recombination. This recombination effect can be reduced through the use of ultrathin coating layer of ZnO on SnO2nanoparticles surface. ZnO-based DSCs also showed lower performance due to its amphoteric nature which help dissolve in slightly acidic dye solution. In this study, the effect of the composite SnO2/ZnO system was investigated. SnO2/ZnO composite DSCs showed 100% and 38% increase of efficiency compared to the pure SnO2-based and ZnO-based devices, respectively, with the gel electrolyte consisting of LiI salt.

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