| Summary: | 碩士 === 國立東華大學 === 光電工程學系 === 103 === Dye-sensitized solar cells (DSSCs) have the advantages of simple process, high efficiency, and low cost. DSSCs have been investigated extensively due to their various features and merits for applications in renewable energy.A typical DSSC consists of a transparent conductive substrate, TiO2 nanoparticles, dyes, an electrolyte, and a platinum (Pt) counter electrode (CE). However, Pt is a rare and expensive metal element and may limit the DSSC applications.As such, replacing the expensive Pt with other materials having the required electrochemical properties for the counter electrode will be much welcome.
There are five parts in this thesis. First, NbSe2 nanoparticles, nanorods, and nanosheets were used as the CEs for DSSCs. The electrode properties and device efficiency based on the NbSe2nanostructures were analyzed. Results showed that DSSCs based on NbSe2 nanosheets CEs achieved a conversion efficiency of 7.73%.Second, nanocomposites using graphene hybrid withmarcrocyclic Ni complex were prepared. The electrode properties and device efficiency were analyzed. The DSSCs fabricated with the macrocyclic Ni complex/graphene-based nanocomposite CEsachieved a power conversion efficiency of 8.30%. Third, nanocomposites using graphene hybrid with marcrocyclic Fe complex were prepared. The electrode properties and device efficiency were analyzed. The DSSCs fabricated with the macrocyclic Fe complex/graphene-based nanocomposite CEs reached a power conversion efficiency of 6.29%. Fourth, CEs were fabricated by dopping1S-(+)-Camphorsulfonic acid 99% (CSA) into conducting polymer Poly(o-methoxyaniline) (POMA).The electrode properties and device efficiency were analyzed. The DSSCs fabricated with the POMA-CSA based CEsachieved a power conversion efficiency of 8.71%.
Finally, nanocomposites using graphene hybrid with conducting polymerPOMA were prepared. The electrode properties and device efficiency were analyzed. The DSSCs fabricated with the POMA-FGO nanocomposite CEsachieved a power conversion efficiency of 8.58%.
|
|---|
