Size-tunable TiO2 nanorod microspheres synthesised via a one-pot solvothermal method and used as the scattering layer for dye-sensitized solar cells

作者：Rui, Yichuan; Li, Yaogang; Zhang, Qinghong^*; Wang, Hongzhi

来源：Nanoscale, 2013, 5(24): 12574-12581.

DOI：10.1039/c3nr04462a

• HIGH-EFFICIENCY
• HOLLOW SPHERES
• PHOTOVOLTAIC PERFORMANCE
• PHOTOCATALYTIC ACTIVITY
• CONVERSION EFFICIENCY
• TEMPERATURE SYNTHESIS
• NANOPARTICLES
• PHOTOANODES
• MORPHOLOGY
• NANOCRYSTALS

TiO2 microspheres assembled by single crystalline rutile TiO2 nanorods were synthesized by one-pot solvothermal treatment at 180 degrees C based on an aqueous-organic mixture solution containing n-hexane, distilled water, titanium n-butoxide and hydrochloric acid. The spheres had a radiative structure from the center, and their diameters were controlled in the range from 1 to 5 mu m by adjusting the volume of the reactant water. Nitrogen adsorption-desorption isotherms showed that all the as-prepared microspheres had relatively high specific surface areas of about 50 m(2) g(-1). The 1 mm sized TiO2 nanorod microspheres were fabricated as a scattering overlayer in DSSCs, leading to a remarkable improvement in the power conversion efficiency: 8.22% of the bi-layer DSSCs versus 7.00% for the reference cell made of a single-layer film prepared from nanocrystalline TiO2. Such improvement was mainly attributed to the enhanced light harvesting and dye loading brought by the effective scattering centers.

• 出版日期2013
• 单位东华大学