scholarly journals ZnO nanowires array grown on Ga-doped ZnO single crystal for dye-sensitized solar cells

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Qichang Hu ◽  
Yafeng Li ◽  
Feng Huang ◽  
Zhaojun Zhang ◽  
Kai Ding ◽  
...  
Keyword(s):  
Solar Cells ◽  
Single Crystal ◽  
Dye Sensitized Solar Cells ◽  
Zno Nanowires ◽  
Dye Sensitized ◽  
Doped Zno ◽  
Zno Single Crystal ◽  
Sensitized Solar Cells ◽  
Nanowires Array

scholarly journals ZnO@TiO2 Core/Shell Nanowire Arrays with Different Thickness of TiO2 Shell for Dye-Sensitized Solar Cells

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 325
Author(s):  
Liqing Liu ◽  
Hui Wang ◽  
Dehao Wang ◽  
Yongtao Li ◽  
Xuemin He ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Dye Adsorption ◽  
Zno Nanowires ◽  
Nanowire Arrays ◽  
Core Shell ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Tio2 Shell

The ZnO@TiO2 core/shell nanowire arrays with different thicknesses of the TiO2 shell were synthesized, through depositing TiO2 on the ZnO nanowire arrays using the pulsed laser deposition process. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images show that these core/shell nanowires were homogeneously coated with TiO2 nanoparticles with high crystallinity, appearing to be a rather rough surface compared to pure ZnO nanowires. The efficiency of ZnO@TiO2 core/shell structure-based dye-sensitized solar cells (DSSCs) was improved compared with pure ZnO nanowires. This is mainly attributed to the enlarged internal surface area of the core/shell structures, which increases dye adsorption on the anode to improve the light harvest. In addition, the energy barrier which formed at the interface between ZnO and TiO2 promoted the charge separation and suppressed the carrier recombination. Furthermore, the efficiency of DSSCs was further improved by increasing the thickness of the TiO2 shell. This work shows an efficient method to achieve high power conversion efficiency in core/shell nanowire-based DSSCs.

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