• 文献标题:   Application of TiO2-graphene nanocomposites to photoanode of dye-sensitized solar cell
  • 文献类型:   Article
  • 作  者:   WANG YC, CHO CP
  • 作者关键词:   graphene, threelayer, nanocomposite, photoanode, dyesensitized solar cell dssc
  • 出版物名称:   JOURNAL OF PHOTOCHEMISTRY PHOTOBIOLOGY ACHEMISTRY
  • ISSN:   1010-6030
  • 通讯作者地址:   Natl Chi Nan Univ
  • 被引频次:   14
  • DOI:   10.1016/j.jphotochem.2016.07.036
  • 出版年:   2017

▎ 摘  要

TiO2-GR nanocomposites with various weight ratios of GR were obtained and applied to fabrication of DSSCs. Three layers of nanocomposites covered on electrodes were superior to one or two layers. An appropriate GR content in a photoanode was favorable to more uniform dispersion of TiO2 nanoparticles, leading to increased amount of dye adsorption and absorbance of visible light. The path and time of electron transport were shortened, interfacial charge transfer was accelerated, recombination probability was lowered, and DSSC performance was thus enhanced. By contrast, excess GR caused nonuniform dispersion of TiO2 nanoparticles. The specific surface area and amount of dye adsorption were reduced, leading to degradation of photocurrent density and device efficiency. It has been demonstrated that the most appropriate ratio of GR was 0.005, giving rise to an efficiency 22% much higher than that of a standard DSSC. (C) 2016 Elsevier B.V. All rights reserved.