| Summary: | 碩士 === 國立臺灣海洋大學 === 機械與機電工程學系 === 97 === This study, investigates the effect on the efficiency of dye-sensitized solar cells by using different types of the structure of TiO2 on the electrode thin film. Improved Submerged Arc Nanoparticle Synthesis System (SANSS) is used to produce nano-sized TiO2 particles as the main structure of the electrode thin film. The TiO2 nanofluids produced by SANSS has the following advantages: stably suspended particles, highly uniform particle size, and particles with high degree of purity. The incident photon to current conversion efficiency (IPCE) of dye-sensitized solar cells is tested by using nanofluids with the best operating parameters. On the hand, commercially available nano-sized Degussa TiO2 particles are transformed into titania nanotubes with one-dimensional nanostructure.
The analysis of XRD, SEM, TEM, and UV-vis, titania nanotubes with high specific surface area and high-ratio cavities can absorb more dyed molecules. It is expected that more electron-hole pairs can be generated, and better performance of IPCE can be possibly achieved.
Three types of TiO2 structure are spin-heated to form the electrode thin films on a ITO electric conduction glass and sealed for safekeeping. The I-V curve of the solar cells are measured. Although titania nanotubes have an obvious advantage of absorbing more dyes on the surface, they cannot be stacked in an effective arrangement when the thin film is formed by using spin-heating. As a result, the electrons’ communication is not good, and the IPCE of the resultant solar cell is much lower than expected. The way to overcome such difficulty needs to be developed in the future.
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