Figure 4From: Optimization of the dye-sensitized solar cell performance by mechanical compressionCross-sectional images of FE-SEM of TiO 2 nanoparticles film with and without compression treatment. (a) As-deposited film and (b-f) after mechanical compression at various pressures, 61, 131, 279, 558, and 858 kg/cm2 with the thickness of 24.0, 23.6, 20.2, 18.4, 17.2, and 14.4 μm, respectively.Back to article page