Improved utilization of photogenerated charge using fluorine-doped TiO2 hollow spheres scattering layer in dye-sensitized solar cells

• Main Authors: Wong, C. C., Song, Junling, Yang, Hongbin, Wang, Xiu, Khoo, Si Yun, Liu, Xue-Wei, Li, Chang Ming
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2013
• Online Access: https://hdl.handle.net/10356/96374; http://hdl.handle.net/10220/10289
• Institution: Nanyang Technological University

We demonstrate a strategy to improve utilization of photogenerated charge in dye-sensitized solar cells (DSSCs) with fluorine-doped TiO2 hollow spheres as the scattering layer, which improves the fill factor from 69.4% to 74.1% and in turn results in an overall efficiency of photoanode increased by 13% (from 5.62% to 6.31%) in comparison with the control device using undoped TiO2 hollow spheres. It is proposed that the fluorine-doping improves the charge transfer and inhibition of charge recombination to enhance the utilization of the photogenerated charge in the photoanode.