Analytical Modeling of Amorphous Silicon-Germanium Heterojunction Solar cell including Double Layer Antireflection Coating Effects

In this paper, an analytical investigation regarding the use of double-layer antireflection coatings (ARC) on heterojunction solar cell (HSC), with the aim of suppressing broadband reflection is presented. In this context, we used a general characteristic-matrix to evaluate the system reflection spectra. HSC Solar cell with optimized double-layer antireflection coatings (ARC) shows an efficiency improvement of 35% over experimental single antireflection coating layer cells. This investigation highlights the impact of top multi-layer antireflection coatings (ARC) parameters. Therefore, it can be stated that these parameters are mandatory factors for improving the HSC cells photovoltaic performance.