Preparation of Wide-Angle and Abrasion-Resistant Multi-Layer Antireflective Coatings by MgF2 and SiO2 Mixed Sol

The wide-angle broadband antireflective coatings (ARCs) were fabricated by a sol-gel method and covered on a soda-lime glass substrate by using dip-coating process. The crystal structural, morphological and antireflection performance of ARCs were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), ultraviolet spectrophotometer (UV-vis), etc. In addition, the optimal experimental parameters of each coating were obtained by optical film design software combined with experimental characterization. The average transmittance of the wide-angle broadband ARCs is 9% higher than 88.90 % of the soda-lime glass substrate in the range of 400-1200 nm. Furthermore, the preliminary evaluation of wear resistance shows that the antireflective performance of the coating was stable before and after the friction test. All the excellent antireflective performance and abrasion-resistance afforded the ARCs with potential application in fields of construction, medical, new energy, military, etc.