Investigations on the Extension of the Life-span of a Dye-sensitized Solar Cell Asada Fumiya MNCT Nakagawa Lab’s Purpose Dye-sensitized solar cell (DSSC) → Low cost → A variety of colors and forms Problems → Low power generation efficiency → Short-lived Source ：Aisin Seiki MNCT Nakagawa Lab’s Purpose Previous work by Yonago Kosen： Using a shell membrane → Longer operating life DSSC → An experiment with only food pigment Absorption of various pigments and extension of life-span MNCT Nakagawa Lab’s Extraction of shell membranes Extraction work of egg membranes which requires time →Consideration of how to carry out extensive extraction and to save egg membranes The rate of pigment absorption conditioned by methods of preservation → Investigation immediately after extraction, room temperature (23 ℃), and freezing MNCT Nakagawa Lab’s Extraction of shell membranes Results of the investigation ① Immediately after extraction and frozen storage → Dyed at the rate of almost 100% ② Room temperature preservation → Dyed at the rate of about 90% Determination of frozen storage MNCT Nakagawa Lab’s Power generation principle ③Electric charge which moves Pigment ①Pigment which receives light ② Emitting the electron (Oxidization of pigment) Light IElectrolysis solution I2 Power generation electrode Titanium oxide ④Reproduction of pigment by electrolysis solution Opposite electrode MNCT Nakagawa Lab’s Production of DSSC (Comparison) Pigment： Stuck to titanium oxide Titanium oxide Transparent electrode Pigment： Stuck to a shell membrane Titanium oxide Shell membrane MNCT Nakagawa Lab’s Production of DSSC (Not using egg membrane) ① One day after Extraction of pigment (Hibiscus) ③ ② Opposite electrode： Carbon is applied. Power generation electrode ： Pigment is applied to titanium oxide. Iodine liquid applied to both power generation electrodes →Combining electrodes MNCT Nakagawa Lab’s Production of DSSC (Using egg membrane) ① ② Applying titanium oxide to a transparent electrode ③ Power generation electrode ： sticking ② on ① Opposite electrode： Applied carbon Absorbed pigment into egg membrane →Dipping in titanium oxide solution ④ The additional iodine liquid to a power generation electrode →Setting electrodes MNCT Nakagawa Lab’s Measurement of DSSC Power generation characteristics ISC[μA] With no shell membrane 76.6 With a shell membrane 77.9 VOC[mV] 294 298 The problem of measurement Fall in power generation caused by heat Using ventilation to prevent rising temperature Hastening of the evaporation of electrolysis solution using ventilation The necessity for encapsulation MNCT Nakagawa Lab’s Conclusion Investigation on the method of the preservation of egg membrane → Increased efficiency in egg membrane extraction Production of two kinds of DSSCs, one with shell membrane and the other without it →① To check power generation characteristics ② Decision on a manufacture method and a measuring method MNCT Nakagawa Lab’s
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