| Summary: | 碩士 === 國立東華大學 === 光電工程學系 === 106 === Dye-sensitized solar cells are known as the third-generation nano thin-film solar cells. For DSSCs, the materials are inexpensive and the fabrication processes are simple, only need simple equipment to make a solar cell. Dye-sensitized solar cells have the advantages of light transparency and flexibility. They can be widely used in daily life, such as small 3C products, glass of buildings. Perovskite solar cells have good light absorption characteristics and high conversion efficiency. Within a few years, the conversion efficiency increased from 3.8% to 22.1%. Material costs and fabrication time are lower than traditional silicon solar cells. Recently, perovskite solar cells have been a hot research topic.
This study uses material and device characteristics analysis to apply different materials and process conditions for dye-sensitized solar cells and perovskite solar cells. The experimental part can be divided into three parts. First, the spin coating speed of the electron transport layer PC60BM for perovskite solar cell was studied. The results showed that the highest PSC efficiency of about 12.36% was obtained at the spin coating speed of 1750 rpm. At 1750 rpm, the film of PC60BM can achieve a flat and coveraged film, which can enhance the electron transport properties. Second, four different organic solvents including toluene (MB), chloroform (CF), chlorobenzene (CB), and orthodichlorobenzene (DCB) were separately added to the perovskite active layer. When toluene (MB) was used, the best surface crystal uniformity and surface coverage can be achieved, and the device efficiency can reach up to about 11%. Third, polymer and GO/Mn composite materials were used as counter electrodes for DSSCs. PEDOT/GO/Mn composites were used to replace the traditional platinum (Pt) counter electrode. The results showed that DSSCs with PEDOT/GO/Mn 300°C counter electrode can achieve the maximum conversion efficiency of 7.69%, which was higher than that of the DSSCs using traditional platinum electrode.
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