Figure 3From: Ga-doped ZnO transparent electrodes with TiO2 blocking layer/nanoparticles for dye-sensitized solar cellsSEM images of the TiO 2 nanoparticles. The TiO2 nanoparticles were coated on the (a) GZO glasses with the TiO2 blocking layer and (b) normal GZO glasses.Back to article page