Research Article

Effectively Improved SiO2-TiO2 Composite Films Applied in Commercial Multicrystalline Silicon Solar Cells

Figure 3

Cross-sectional SEM images (a) before firing and (b) after firing of SiO2-TiO2 composite films.
823254.fig.003a
(a) Before annealing
823254.fig.003b
(b) After annealing