Nano Archive

Cauliflower-like TiO2 rough spheres: Synthesis and applications in dye sensitized solar cells

Yang, Lei and Lin, Yuan and Jia, Hanguang and Li, Xueping and Xiao, Xurui and Zhou, Xiaowen (2008) Cauliflower-like TiO2 rough spheres: Synthesis and applications in dye sensitized solar cells. MICROPOROUS AND MESOPOROUS MATERIALS, 112 (1-3). pp. 45-52.

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A series of mesoporous TiO2 rough spheres of alterable surface morphologies and pore structures were produced by altering initial temperatures and structural directing agents, Pluronic P105 (EO37PO56EO37) or F68 (EO78PO30EO78) tri-block copolymers. The average pore size increased with increasing initial temperature and in direct proportion to the polymer chain length. Various formation mechanisms were investigated including nucleation, growth and conglomeration of the initial TiO2 particles. Tile morphologies of mesoporous TiO2 rough spheres were completely maintained after calcination at 450 degrees C for 30 min. For dye sensitized solar cells (DSSCs) applications, efficient light scattering was obtained with the double layer film composed of a transparent layer containing 20 nm particles and a scattering layer containing similar to 275 nm TiO2 spheres. The rough TiO2 spheres increase the overall conversion efficiency of DSSCs by 20.8% compared to TiO2 Smooth spheres, and reach 6.56%. (C) 2007 Elsevier Inc. All rights reserved.

Item Type:Article
Uncontrolled Keywords:dye sensitized solar cells; mesoporous materials; nanostructures; P105; titania
Subjects:Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Material Science > Nanostructured materials
Material Science > Nanochemistry
ID Code:1333
Deposited By:Anuj Seth
Deposited On:09 Dec 2008 15:11
Last Modified:20 Jan 2009 09:45

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