Figure 6From: Optimization of dye adsorption time and film thickness for efficient ZnO dye-sensitized solar cells with high at-rest stabilityEquivalent circuit and Nyquist plots. (a) Equivalent circuit for the simulation of impedance spectra. (b) Nyquist plots of cells based on 26-μm films. The experimental impedance data were determined under 1 sun AM 1.5 G simulated light.Back to article page