| Summary: | 碩士 === 國立東華大學 === 光電工程學系 === 105 === Dye-Sensitized Solar Cells (DSSCs) have attracted much attention due to their various merits, such as relatively 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). Normally, platinum (Pt)is used as the CE material. However, the cost of Pt is relatively expensive. Therefore, developing a low-cost CE to replace Pt electrodes is a meaningful issue for the cost reduction of DSSCs.
This study focuses on the investigation of nanocomposite materials of graphene oxide (GO) and transition metal as counter electrodes for DSSCs. There are four parts in this thesis. First, nanocomposite materials of GO and marcrocyclic Mn complex were prepared. The electrode properties and device efficiency of various weight ratio of GO and Mn macrocyclic complex were analyzed. The DSSCs fabricated with the GO/Mn (1:10) CEs achieved a power conversion efficiency of 7.47%, which was higher than that of the Pt counter electrode. Second, nanocomposite materials of GO and marcrocyclic Zn complex were prepared. The electrode properties and device efficiency were analyzed. The DSSCs fabricated with the GO/Zn (1:10) CEs achieved a power conversion efficiency of 7.78 %, which was higher than that of the Pt counter electrode. Third, nanocomposite materials of GO and marcrocyclic Co complex were prepared. The electrode properties and device efficiency were analyzed. The DSSCs fabricated with the GO/Co (1:10) CEs achieved a power conversion efficiency of 7.48 %, which was higher than that of the Pt counter electrode. Fourth, nanocomposite materials of GO and marcrocyclic Cu complex were prepared. The electrode properties and device efficiency were analyzed. The DSSCs fabricated with the GO/Cu (1:10) CEs achieved a power conversion efficiency of 7.61 %, which was higher than that of the Pt counter electrode. The results show that GO/Mn, GO/Zn, GO/Co, and GO/Cu CEs have the potential to replace Pt electrodes.
|
|---|
