Figure 2

Optical and photovoltaic properties. (a) Transmittance of the three types of photoanodes adhered to the FTO glass substrates before the sensitization with N719. The insets from left to right show the photos of the photoanodes, TP (3 L), TP (3 L) + STNA, and TP (3 L) + LTNA, respectively. Here, 3 L stands for the optimized thickness of the TiO₂ particle layer in a TP-based DSSC. (b) Photocurrent-voltage curves (1 Sun) of the TP (3 L)-based DSSCs coupled with different scattering layers, i.e., LTNA and STNA, with a thickness of 1.8 μm.