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.

scholarly journals Solar Energy Conversion by Dye-Sensitized Photovoltaic Cells Using High Surface Area Mesoporous Carbon Counter Electrode

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
Pavuluri Srinivasu ◽  
Surya Prakash Singh ◽  
Ashraful Islam ◽  
Liyuan Han
Keyword(s):  
Surface Area ◽  
Mesoporous Carbon ◽  
Counter Electrode ◽  
Electrode Materials ◽  
High Surface ◽  
High Surface Area ◽  
Dye Sensitized Solar Cells ◽  
Superior Performance ◽  
Spherical Particles ◽  
Dye Sensitized

Development of new counter electrode materials is vital for commercialization of efficient dye-sensitized solar cells (DSCs) process. Research on DSCs has been focused mainly on using platinum as counter electrode, which makes them expensive. In this paper, we report DSCs fabricated with high surface area mesoporous carbon thin film with uniform spherical particles as counter electrode. An overall light-to-electricity efficiency as high as 7.6% has been achieved under illumination of air mass (AM) 1.5 sunlight (100 mW/cm2). In comparison with activated carbon, high surface area mesoporous carbon shows superior performance. Our results show that mesoporous carbon with high specific surface area and uniform pore size distribution proved to be better efficient electrode material for DSCs.

scholarly journals Novel Approach for the Synthesis of Nanocrystalline Anatase Titania and Their Photovoltaic Application

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Pavuluri Srinivasu ◽  
Surya Prakash Singh ◽  
Ashraful Islam ◽  
Liyuan Han
Keyword(s):  
Surface Area ◽  
Mesoporous Carbon ◽  
High Surface ◽  
High Surface Area ◽  
Dye Sensitized Solar Cells ◽  
Nitrogen Adsorption ◽  
Complete Removal ◽  
Titanium Tetraisopropoxide ◽  
Dye Sensitized ◽  
Anatase Titania

High surface area titania with crystalline anatase walls has been synthesized using ordered large mesoporous carbon as a template. The pore structure of mesoporous carbon is infiltrated with titanium tetraisopropoxide solution at room temperature and the mixture is subjected to heat treatment at in presence of air to complete removal of the template. The prepared crystalline anatase frameworks are characterized by XRD, N2 adsorption and HR-TEM. The nitrogen adsorption-desorption analysis of the prepared anatase titania particles exhibits BET specific surface area of 28 m2/g. The dye-sensitized solar cells performance of this anatase titania material has been tested and energy conversion efficiency of 3.0% is achieved under AM 1.5 sunlight. This work reports a new approach for fabrication of nanocrystalline anatase titania by simple hard templating technique for the first time and their applications for dye-sensitized solar cell.

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

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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