PbS QD's doped TiO2 nanotubes and nanofibers

FUEL 265

Chunrong Xiong, bearcr_82@hotmail.com, Department of Chemistry and the UTD NanoTech Institute, University of Texas at Dallas, 2601 North Floyd Road, Richardson, TX 75083-0688, Chalita Ratanatawanate, cxr056000@utdallas.edu, Department of Chemistry and the Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75083-0688, and Kenneth Balkus Jr., balkus@utdallas.edu, Department of Chemistry, University of Texas at Dallas, 2601 N. Floyd Rd, Richardson, TX 75080.
Lead sulfide (PbS) quantum dots (QDs) have received much attention because of their inherent properties including the smallest band gap, as well as a large exciton Bohr radius of 18 nm. These PbS QD have been investigated as a material for use as an alternative sensitizer in a Graetzel solar cell, because of the many advantages they have over organic dyes, including multiple electron generation (MEG), photo stability, and a controllable spectral absorption range which is tunable through particle size. The use of titanium dioxide nanotubes and nanofibers have a high surface to volume ratio, which has been shown to be advantageous for applications in solar cells, photocatalysis, and gas sensing, by suppressing the recombination of electron hole pairs. In this study, we will discuss the preparation of TiO2 nanotubes, fabricated through a hydrothermal technique, and nanofibers, which were fabricated through a templating method. The doping of these two materials with PbS QDs will also be demonstrated as well as the ability to control the size of the QDs, thus controlling the spectral absorption range.
 

Photovoltaic Solar Cells for Energy Applications: Nanomaterials for PV Applications
9:00 AM-12:15 PM, Thursday, August 23, 2007 Boston Park Plaza -- Cambridge Rm, Oral

Sci-Mix
8:00 PM-10:00 PM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Sci-Mix

Division of Fuel Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007