Acid Treatment of Titania Pastes to Create Scattering Layers in Dye-Sensitized Solar Cells
Figure 4
Ratio of back/front ( = red from RGB analysis) for dyed TiO2 layers where the back face has been treated in 2 M HNO3 for different immersion times. A value of 1 indicates identical colouration on both sides of the cell and values less than 1 indicate that less dye uptake is present on the acid-treated face.
