Fabrication solar cell of $\hbox {CdTe}_{0.65}\hbox {P}_{0.35}$/Si with high efficiency using double-layer antireflection

Abstract

In this work, solar cells that have double-layer coatings of $\hbox {CdTe}_{0.65}\hbox {P}_{0.35}$/Si with high efficiency have been fabricated. The electrical and optical properties of $\hbox {CdTe}_{0.65}\hbox {P}_{0.35}$/Si as transparent electrodes and antireflection (AR) coatings for Si-based solar cells are studied. This is done by adding fabricated graded refractive index AR coatings using $\hbox {TiO}_{2}$ and $\hbox {SiO}_{2}$ thin films kept over 80% of transmittance. As the AR coating with graded refractive indices using $\hbox {TiO}_{2}$ and $\hbox {SiO}_{2}$ layers was applied to generic silicon-based solar cell, the current level increases nearly twice more than that of bare silicon solar cell without AR coatings. The obtained results show that optimized double-layer ARCs can minimize reflectance within the spectral range of $\sim$400–945 nm, with the latter maintaining this performance over a broader spectrum of 390–1000 nm, in comparison with 45.05% reflectance for the bare solar cell.