Transparency and water-resistance enhancement of AR coating for the cover glass in the solar cell module

摘要

This paper demonstrates the antireflection coating of SiO nanospheres applied to cover glass by using the optimal spin-coating method. Because of the hydrolysis and condensation reactions between the SiO nanosphere antireflection (AR) coating and n-octadecyltriethoxysilane solution (C-TEOS), the contact angle of the AR coating with hydrophobic treatment can be enhanced to 110° and the water-resistant remains unchanged which preserved similar transmittance for six weeks. Furthermore, the AR coating with hydrophobic treatment exhibits approximately 3% and 7% improvement in the transmittance of unpolarized light at normal and oblique incidence, respectively. And the transmittances of p- and s- polarization states are shown opposite tendency as incident angle increase. The hydrophobic and omnidirectional AR coating with nanoscale SiO particles can be fabricated using the proposed simple and economical method.