Template-free sol–gel preparation of antireflection films with adjustable refractive index

Yanling Guo; Xinrong Chen; Chaoming Li; Qing Xu; Yong Xu; Xu Chen; Jianhong Wu

doi:10.1117/12.2544816

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18 December 2019 Template-free sol–gel preparation of antireflection films with adjustable refractive index

Yanling Guo, Xinrong Chen, Chaoming Li, Qing Xu, Yong Xu, Xu Chen, Jianhong Wu

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Proceedings Volume 11336, AOPC 2019: Nanophotonics; 113360D (2019) https://doi.org/10.1117/12.2544816
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

A antireflection film with adjustable refractive index from 1.17 to 1.41 was prepared at room temperature via a template-free sol–gel method, using tetraethylorthosilicate(TEOS) as co-precursor. In this study, the regulation of the refractive index is achieved by mixing different volumes of acid-catalyzed silica sol having a refractive index of 1.41 with a base-catalyzed silica sol having a refractive index of 1.17. The silica coating, with a refractive index of 1.2332, prepared by this base/acid two step catalysis sol-gel process can increase the transmittance of K9 glass by about 3.5%.

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Yanling Guo, Xinrong Chen, Chaoming Li, Qing Xu, Yong Xu, Xu Chen, and Jianhong Wu "Template-free sol–gel preparation of antireflection films with adjustable refractive index", Proc. SPIE 11336, AOPC 2019: Nanophotonics, 113360D (18 December 2019); https://doi.org/10.1117/12.2544816

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