A broadband antireflective coating based on a double-layer system containing mesoporous silica and nanoporous silica. Issue 27 (22nd June 2015)

• Record Type: Journal Article
• Authors: Sun, Jinghua; Cui, Xinmin; Zhang, Ce; Zhang, Cong; Ding, Ruimin; Xu, Yao
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 27(2015)
• Page Start: 7187
• Page End: 7194
• Publication Date: 2015-06-22
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5tc00986c
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A broadband antireflective coating containing two layers of silica with different pore structures, showing excellent optical performance for solar applications. Abstract : A double-layer broadband antireflective (AR) coating with excellent transmittance was successfully fabricated using two kinds of silica coatings. The excellent optical performance in a wide wavelength range came from a reasonable refractive index gradient from air to the substrate produced by the mesopores in the bottom-layer silica coating and the particle-packed pores in the top-layer silica coating. The maximum transmittance of the broadband AR coating was approximated to 100.0% at the peak value and above 99.6% in the visible region from 400 to 800 nm. Meanwhile, the average transmittance of the coating was more than 99.0% over the range of 360 to 920 nm. In addition, the double-layer broadband silica AR coating showed strong mechanical performance and good environmental stability. This work provides an alternative way to prepare a broadband AR coating for some applications in energy harvesting and optical devices.