| Summary: | 碩士 === 國立臺灣師範大學 === 工業教育學系 === 106 === Green energy materials become the main goal of research in recent years. The solar energy technology and application has become one of the international sustainable energy trends. Among the solar cells, dye-sensitized solar cells have characteristics of simple process and great absorption capacity of visible spectrum.
The photon-to-electron conversion efficiency (PCE) of the dye-sensitized solar cells (DSSCs) strongly depends upon the electron generation efficiency from the dye molecules. One useful method in enhancing the PCE of DSSCs is to generate more electrons by enhancing the light harvesting of the dye molecules. The characteristic of the absorption and the emission spectrum of the phosphorescence material is used to produce Förster resonance energy transfer effect (FRET) with the N719 dye. The effect could convert less response spectrum into more response spectrum (400-600nm).
This study would use the FRET to import a scattering layer with phosphorescence property to the structure of the cells. The results show that the phosphorescence scattering layer can improve the incident photon-to-electron conversion efficiency (IPCE) of the DSSCs at 380-530 nm and improve the PCE. The DSSCs made of 40μm TiO2 film and 7wt% phosphorescence scattering layer has an efficiency of 4.17%, of which Voc is 0.66V, Jsc is 11.42mA/cm2, and FF is 0.55, which is up to 28.3% compared with the DSSCs with 0wt% phosphorescence scattering layer.
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