Spectral Factor of Colored Solar Cells: A Case Study on the Main Urban Areas in Romania

Figure 4

Spectral solar irradiance estimated with Leckner’s model [12] emerging from the coating layer. The curve color corresponds to the cell color except the white cell for which is displayed in gray. The curve in black corresponds to AM1.5G solar spectrum. The characteristic signature of each spectrum measured by the average photon energy (APE) (Equation (6) is presented.