Figure 1From: The influence of anatase-rutile mixed phase and ZnO blocking layer on dye-sensitized solar cells based on TiO2nanofiberphotoanodesSEM images of electrospun nanofibers. As-spun TiO2-PVP nanofibers (a), TiO2 nanofibers after calcination at 500°C (b), 550°C (c), and 600°C (d). The insets in b, c, and d are high-magnification photos of single nanofibers.Back to article page