Journal of Shanghai University(Natural Science Edition) ›› 2020, Vol. 26 ›› Issue (4): 544-551.doi: 10.12066/j.issn.1007-2861.2087

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Synthesis and photoelectrical properties of hierarchical-structured anatase TiO2 nanoflowers

YANG Huang, LI Yi, WANG Rui, YANG Weiguang()   

  1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444
  • Received:2018-05-17 Online:2020-08-30 Published:2020-01-10
  • Contact: YANG Weiguang E-mail:wgyang@shu.edu.cn

Abstract:

Oxide semiconductor nanomaterials are used as aonde materials for dye- sensitized solar cells (DSSCs). One-dimensional nanostructures have enhanced electron collection of carriers and superior charge transport compared to spherical nanoparticles. However, they suffer from low dye-loading caused by small surface areas and unfavorable arrangement for a photo-generated electron extraction. Anatase TiO2  nanorods-based nanoflowers have been successfully synthesized using a simple one-step hydrothermal method. Such hierarchical nanostructures can be controlled by reaction time. The dye absorption capacities of the as-obtained hierarchical nanostructures increase with the reaction time. The highest cell efficiency (7.29%) of the DSSC is achieved through the TiO2  nanoflowers prepared for 70 h.

Key words: TiO2 , nanoflowers, dye-sensitized solar cells, anode

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