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Keywords:

  • conversion efficiency;
  • dye-sensitized solar cells;
  • metal absorption;
  • plasmonic effects

Abstract

The parasitic absorption effect of metal nanoparticles in the dye-sensitized solar cells (DSSC) was investigated using the finite difference time domain technique. It was shown that the conversion efficiency can be improved up to 15–20% in the DSSC device with an optimized metal nanoparticle array of 210 nm in diameter and 500 nm in period, but even under the optimized conditions, the absorption of metal nanoparticles take up about 20–30% of the total absorption of DSSC at visible wavelengths. The heat loss of smaller (70 nm) metal nanoparticles at visible light wavelengths is far greater than the electromagnetic energy scattered into the optical active dye-sensitized medium. The possible direction was proposed to solve the metal parasitic absorption problem.