Rapid communication

Applied Physics A

, Volume 88, Issue 1, pp 173-178

First online:

Layer-by-layer Au nanoparticles as a Schottky barrier in a water-based dye-sensitized solar cell

  • Y.H. SuAffiliated withDepartment of Materials Science and Engineering, National Cheng Kung University
  • , W.H. LaiAffiliated withDepartment of Materials Science and Engineering, National Cheng Kung University Email author 
  • , L.G. TeohAffiliated withDepartment of Mechanical Engineering, National Pingtung University of Science and Technology
  • , M.H. HonAffiliated withDepartment of Materials Science and Engineering, National Cheng Kung University
  • , J.L. HuangAffiliated withDepartment of Materials Science and Engineering, National Cheng Kung University

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Abstract

We fabricated layer-by-layer gold nanoparticles (Au NPs) onto an electrode as a Schottky barrier in a water-based dye-sensitized solar cell. The Maxwell–Garnett equation was used to fit the characteristics of the Au film. The short-circuit current for four layers of Au NPs in a water-based dye-sensitized solar cell (DSSC) ranges from 2.76 mA/cm2 to 5.96 mA/cm2, which is due to the Schottky barrier reducing the number of electrons going from the semiconductor back to either the dye or the electrolyte. The efficiency of photo-electric conversion for four layers of Au NPs in water-based DSSC can be enhanced from 0.26% up to 0.95%.