Publikationsdatum:
2017-08-22
Beschreibung:
Herein, enhancement of dye-sensitized solar cell (DSC) performance is reported by combining the merits of the dye loading of TiO 2 nanoparticles and light scattering, straight carrier transport path and efficient electron collection efficiency of TiO 2 cubes. We fabricate DSC devices with various arrangement styles and compositions of the electrodes in the forms of monolayer and double layer films. For this purpose, the solvothermal synthesized TiO 2 cubic particles (100-600 nm) are employed as the scattering layer, whereas TiO 2 nanoparticles (15-30 nm) synthesized via a combination of solvothermal and sol-gel routes are used as the active layer of devices. We improve the photovoltaic characteristics of DSCs by two mechanisms. First, the light harvesting of DSC devices made of nanoparticles is improved by controlling the thickness of monolayer films, reaching the highest efficiency of 7.0%. Second, the light scattering and electron collection efficiency are enhanced by controlling the composition of double layer films composed of mixtures of TiO 2 nanoparticles and cubes, obtaining the maximum efficiency of 8.21%. The enhancements are attributed to balance between charge transfer resistance and charge recombination of photo-generated electrons as well as dye loading and light scattering. This article is protected by copyright. All rights reserved.
Print ISSN:
0002-7820
Digitale ISSN:
1551-2916
Thema:
Maschinenbau
