This work was supported by the State Key Research Development Program of China (2010CB833103), the National Natural Science Foundation of China (60976073), the National Found for Fostering Talents of Basic Science (J1103212), and the Foundation for Outstanding Young Scientist in Shandong Province (BS2010CL036). J. Jiao thanks the financial support from the Oregon Nanoscience Microtechnologies Institute (ONAMI) and the National Science Foundation.
Journal of Nanomaterials
Semiconductor nanoparticles, Annealing of metals, Metallic oxides, Photovoltaic cells -- Analysis
Large area rutile TiO₂ nanorod arrays were grown on F:SnO₂ (FTO) conductive glass using a hydrothermal method at low temperature. CdSe quantum dots (QDs) were deposited onto single-crystalline TiO₂ nanorod arrays by a chemical bath deposition (CBD) method to make a photoelectrode. The solar cell was assembled using a CdSe-TiO₂ nanostructure as the photoanode and polysulfide solution as the electrolyte. The annealing effect on optical and photovoltaic properties of CdSe quantum-dotssensitized TiO₂ nanorod solar cells was studied systematically. A significant change of the morphology and a regular red shift of band gap of CdSe nanoparticles were observed after annealing treatment. At the same time, an improved photovoltaic performance was obtained for quantum-dots-sensitized solar cell using the annealed CdSe-TiO₂ nanostructure electrode. The power conversion efficiency improved from 0.59% to 1.45% as a consequence of the annealing effect. This improvement can be explained by considering the changes in the morphology, the crystalline quality, and the optical properties caused by annealing treatment.
Yitan Li, Lin Wei, Ruizi Zhang, Yanxue Chen, and Jun Jiao, “Annealing Effect on Photovoltaic Performance of CdSe Quantum-Dots-Sensitized TiO2 Nanorod Solar Cells,” Journal of Nanomaterials, vol. 2012, Article ID 103417, 6 pages, 2012.