scholarly journals Enhanced Efficiency of Dye-Sensitized Solar Cell by High Surface Area Anatase-TiO2-Modified P25 Paste

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Mengmei Pan ◽  
Niu Huang ◽  
Xingzhong Zhao ◽  
Jun Fu ◽  
Xiaoli Zhong
Keyword(s):  
Surface Area ◽  
Conversion Efficiency ◽  
Large Scale ◽  
High Surface ◽  
High Surface Area ◽  
Dye Sensitized Solar Cells ◽  
Manufacturing Cost ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Large Scale Manufacture

How to improve the conversion efficiency and the stability of dye-sensitized solar cells (DSSCs) are two major problems. Furthermore, reduction of the manufacturing cost of DSSCs and large-scale manufacture are also very important factors. As a raw material, commercial P25 would be used for large-scale manufacture of TiO2paste with simple preparation procedure. However, there are several drawbacks for P25 such as the low surface area of P25 powder and the poor connectivity among particles in film using tradition P25 paste without modification. In this paper, we introduced a simple modified method by adding high surface area anatase TiO2into pure P25 paste. The photoelectric conversion performances of DSSCs based on these photo-electrodes were tested. The results show that the open-circuit voltage, the fill factor and the energy conversion efficiency of the modified electrode were increased. It is found that the modified P25 films have fast electron transportation and a slow charge recombination. We conclude that through adding the anatase TiO2nanoparticles to the P25 paste with high surface area, it can not only improve the particles connectivity among inside the films, but also enhance the efficiency of DSSCs.

Efficiency Enhancement in Dye-Sensitized Solar Cell Using TiO2 /Ilmenite-Derived Nanofiber Composite as Working Electrode

2014 ◽  
Vol 925 ◽  
pp. 600-604
Author(s):  
Athapon Simpraditpan ◽  
Thanakorn Wirunmongkol ◽  
Sorapong Pavasupree ◽  
Wisanu Pecharapa
Keyword(s):  
Nanocomposite Film ◽  
High Surface ◽  
Hydrothermal Process ◽  
High Surface Area ◽  
Dye Sensitized Solar Cells ◽  
Nanocomposite Films ◽  
Film Electrode ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Working Electrode

TiO2 nanocomposite films of calcined TiO2 nanofibers and commercial-grade TiO2 nanoparticles Degussa (P25) utilized as working electrode of dye-sensitized solar cells (DSSCs) are prepared by a doctor blade method. TiO2 nanofibers were synthesized from ilmenite mineral by hydrothermal process in combination with calcinations process. The prepared samples are characterized by XRD, XPS and TEM. The photoelectric conversion performance of the DSSC based on nanocomposite film electrode was compared to the device fabricated by pure P25 at the same film thickness. The result shows that as calcination temperature increases, the transformation of nanofibers to nanorods and nanoparticles were observed. The energy conversion efficiency (ƞ) of the device tends to with increasing calcined temperature. The greatest ƞ is 3.90% obtained from DSSC fabricated from nanocomposite film electrode of 5 wt.% nanofibers calcined at 800 oC for 2 h mixed with P25, indicating the significant enhancement in its performance by the incorporation of the nanofibers. This enhancement of DSSCs may correlate to high surface area, higher light scattering and light harvesting, low charge recombination and fast electron-transfer rate by nanofibers.

scholarly journals Dye-Sensitized Solar Cells Based on High Surface Area Nanocrystalline Zinc Oxide Spheres

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Pavuluri Srinivasu ◽  
Surya Prakash Singh ◽  
Ashraful Islam ◽  
Liyuan Han
Keyword(s):  
Zinc Oxide ◽  
Solar Cells ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Dye Sensitized Solar Cells ◽  
Oxide Material ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Nanocrystalline Zinc Oxide

High surface area nanocrystalline zinc oxide material is fabricated using mesoporous nanostructured carbon as a sacrificial template through combustion process. The resulting material is characterized by XRD, N2 adsorption, HR-SEM, and HR-TEM. The nitrogen adsorption measurement indicates that the materials possess BET specific surface area ca. 30 m2/g. Electron microscopy images prove that the zinc oxide spheres possess particle size in the range of 0.12 μm–0.17 μm. The nanocrystalline zinc oxide spheres show 1.0% of energy conversion efficiency for dye-sensitized solar cells.

High-surface-area nanomesh graphene with enriched edge sites as efficient metal-free cathodes for dye-sensitized solar cells

Nanoscale ◽  
2016 ◽  
Vol 8 (26) ◽  
pp. 13059-13066 ◽  
Author(s):  
Wang Yang ◽  
Xiuwen Xu ◽  
Yalun Gao ◽  
Zhao Li ◽  
Cuiyu Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Dye Sensitized Solar Cells ◽  
Metal Free ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

scholarly journals Metal-Free Counter Electrode for Efficient Dye-Sensitized Solar Cells through High Surface Area and Large Porous Carbon

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
Pavuluri Srinivasu ◽  
Surya Prakash Singh ◽  
Ashraful Islam ◽  
Liyuan Han
Keyword(s):  
Electron Microscopy ◽  
Surface Area ◽  
Mesoporous Carbon ◽  
Counter Electrode ◽  
High Surface ◽  
High Surface Area ◽  
Dye Sensitized Solar Cells ◽  
Nitrogen Adsorption ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Highly efficient, large mesoporous carbon is fabricated as a metal-free counter electrode for dye-sensitized solar cells. The mesoporous carbon shows very high energy conversion efficiency of 7.1% compared with activated carbon. The mesoporous carbon is prepared and characterized by nitrogen adsorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The nitrogen adsorption data reveals that the material possesses BET specific surface area ca.1300 m2/g and pore diameter 4.4 nm. Hexagonal rod-like morphology and ordered pore structure of mesoporous carbon are confirmed by electron microscopy data. The better performance of this carbon material is greatly benefited from its ordered interconnected mesoporous structure and high surface area.

High-surface-area, interconnected, nanofibrillar TiO2 structures as photoanodes in dye-sensitized solar cells

2013 ◽  
Vol 68 (7) ◽  
pp. 487-490 ◽  
Author(s):  
Dharani Sabba ◽  
Nripan Mathews ◽  
Julianto Chua ◽  
Stevin S. Pramana ◽  
Hemant K. Mulmudi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Anatase Mesoporous TiO2 Nanofibers with High Surface Area for Solid-State Dye-Sensitized Solar Cells

Small ◽  
2010 ◽  
Vol 6 (19) ◽  
pp. 2176-2182 ◽  
Author(s):  
Wei Zhang ◽  
Rui Zhu ◽  
Lin Ke ◽  
Xizhe Liu ◽  
Bin Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Dye Sensitized Solar Cells ◽  
Mesoporous Tio2 ◽  
Tio2 Nanofibers ◽  
Dye Sensitized ◽  
Sensitized Solar Cells
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