Double Layer Anti-Reflective Coating of SiO2/ZnO for Photovoltaic Cell

Abstract

In this paper silicon based photo voltaic (PV) cells has been designed using double layer (SiO2/ZnO) anti-reflective coating (ARC). Here reflection spectrum of single layer anti-reflective coating (SLAR) of SiO2&ZnO individually and double layer anti-reflective coatings (DLAR) of SiO2/ZnO are compared. ZnO is a wide band semiconductor which provides good transparency and high electron mobility. The results indicated that the DLAR of SiO2/ZnO proved to be a valuable achievement to obtain highly absorbent surfaces. The results are obtained with planar surface of crystalline silicon substrate using Air Mass 1.5 Global (AM 1.5 G) spectrums. The average reflectance of 6.5% has been achieved within the range of 300-1400nm as maximum solar spectral irradiance of AM 1.5 G is in this region.