| Summary: | 碩士 === 國立臺北科技大學 === 製造科技研究所 === 100 === The study mainly compares the features of high-molecular gel-type dye-sensitized solar cell (DSSC) composed of different components. Different electrolytes are used to synthesize with different high-molecular materials and solvents, intending to find out the best prescription. The experiments of the study use LiI and KI, together with I2, to serve as electrolytes, which are added with high-molecular additives, polyethylene glycol (PEG) and polyvinyl pyrrolidone (PVP), as well as two solvents, acetonitrile (ACN) and propylene carbonate (PC), to prepare gel-type electrolytes. The study analyzes the features of the electrolytes synthesized by different assembly ways, and compares the addition proportions of different high molecules. In the experiments, photoelectrode is made by coating a layer of TiO2 thin film at thickness of 15~30um on ITO conducting glass; and counter electrode is made by sputtering a layer of Pt at thickness of 20um on FTO conducting glass. They both receive conversion efficiency test. The experimental results show that the composition of 0.5M of LiI + 0.05M of I2 and ACN, as well as addition of 20 wt.% of PEG, can achieve the best performance. Under illumination of light source 100mWcm-2, the DSSC with electrolyte composed in this way has fill factor 0.5, short-circuit density 12.11mAcm-2, open-circuit voltage 680mV, and conversion efficiency 4.13%. Comparing with the DSSC using liquid-state electrolyte, the DSSC composed of gel-type electrolyte has more stable conversion efficiency. The seventh day, its conversion efficiency is 2.4%, and the fourteenth day, its conversion efficiency is 0.35%.
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