| Summary: | 碩士 === 國立東華大學 === 光電工程學系 === 106 === Dye-Sensitized Solar Cells (DSSCs) have attracted much attention due to their various merits, such as high efficiencies, simple device structures, easy fabrication, and low cost. These features have made DSSCs attractive for solar energy applications in the face of increasing energy and environmental challenges. A typical DSSC consists of a transparent conductive substrate, a porous thin-film photoelectrode composed of TiO2 nanoparticles, dyes, an electrolyte, and a counter electrode (CEs). However, Pt is a rare and expensive metal element and may limit the DSSC applications.
This study was divided into three parts. Firstly, we used polyaniline as the counter electrode material of dye-sensitized solar cells, and improved the characteristics of the counter electrode by adding modified materials and graphene oxide. FESEM was used to analyze the surface morphology of the electrode, AFM was used to analyze the surface roughness of the film, EDS was used to investigate the elemental composition, XRD was used to analyze the crystal phase of the materials, and CV was used to investigate the electrochemical characteristics. Then, the photoelectric conversion efficiency, electrochemical impedance, and external quantum efficiency of the DSSCs were investigated.
Secondly, the N-type Cu2O working electrode was fabricated, and its surface morphology, elemental composition, and electrochemical characteristics were analyzed. Then, the working electrode of Cu2O and platinum counter electrode were combined to fabricate a solar cell, and the photoelectric conversion efficiency of the solar cell was analyzed.
Finally, the dye-sensitized solar cell counter electrode was made of WS2 and platinum, the surface morphology of the electrode was analyzed by FESEM, the elemental composition was measured by EDS, the material was observed by XPS, and the electrochemical characteristics were analyzed by CV. The photoelectric conversion efficiency, the impedance spectrum, and the external quantum efficiency of the dye-sensitized solar cells were analyzed.
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