Preparation of Smooth Surface TiO₂ Photoanode for High Energy Conversion Efficiency in Dye-Sensitized Solar Cells

Figure 2

TEM image (a) a-TiO₂ nanosol (b) P-25, (c) ST-01, (d) ST-21 ((a)–(d)) before sintering ((e)–(h)) after sintering at 500°C.

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