Optical Losses of Frontal Layers in Superstrate CdS/CdTe Solar Cells Using OPAL2

In this paper, optical losses in CdS/CdTe solar cells are calculated on the basis of designated reflective index various frontal layers using an OPAL2 calculator for first time. Two types glass (0.1 mm ultra-thin Schott and 1.1 standard borosilicate glass) were assumed to be coated by different Transparent-Conducting-Oxides (TCOs) such as SnO2:F, ZnO:Al, ITO forming superstrate configuration. Absorption, reflectance, transmittance, consequently bandgap energies a function common thicknesses, used literature. The results show that increase TCO thickness led decrease band gap well enhancement contact potential difference, which can deteriorate device performance. optimum 100 nm SnO2:F was calculated, while 200 ZnO:Al reasonable caused reflections at interfaces’ layer’s absorption. It is seen 80 150 CdS might effective range satisfy high short circuit current low defect densities interface. Finally, minimum 2 μm CdTe result highest 28.69 mA/cm2. This work offers practical equivalent strategy applied any containing layers.