Hybrid Nanostructured Antireflection Coating by Self-Assembled Nanosphere Lithography

Abstract

Broadband antireflection (AR) coatings are essential elements for improving the photocurrent generation of photovoltaic modules or the enhancement of visibility in optical devices. In this paper, we report a hybrid nanostructured antireflection coating combination that is a clean and efficient method for fabricating a nanostructured antireflection coating (ARC). A multilayer thin-film was introduced between the ARC and substrate to solve the significant problem of preparing nanostructured ARCs on different substrates. In this way, we rebuilt a gradient refractive index structure and optimize the antireflective property by simply adjusting the moth-eye structure and multilayers. Subwavelength-structured cone arrays were directly patterned using a self-assembled single-layer polystyrene (PS) nanosphere array as an etching mask. Nanostructure coatings exhibited excellent broadband and wide-angle antireflective properties. The bottom-up preparation process and hybrid structural combination have the potential to significantly enhance the broadband and wide-angle antireflective properties for a number of optical systems that require high transparency, which is promising for reducing the manufacturing cost of nanostructured AR coatings.

Manufacture of Binary Nanofeatured Polymeric Films Using Nanosphere Lithography and Ultraviolet Roller Imprinting

“…Additionally, the binary nanofeatured films developed in this work exhibited superior energy transformation efficiency to unitary nanofeatured films of either 300 nm (6.02%) or 900 nm (5.96%) [21]. With a binary nanofeature, the surface absorbs most of the incident light, thus reducing reflection, especially in 300-1000 nm wavelength regime [22][23][24]. The binary nanotextured surface also increases the path length of light as it travels through the Finally, to simply demonstrate the capability of imprinted binary nanofeatured films, photocurrent-voltage tests were carried out, utilizing a lab-made device that consists of polycrystalline silicon panel, Xenon lamp that possesses a power supply of 2400 mV (Titan Electro-Optics, Taipei, Taiwan), and simulation code.…”

“…Additionally, the binary nanofeatured films developed in this work exhibited superior energy transformation efficiency to unitary nanofeatured films of either 300 nm (6.02%) or 900 nm (5.96%) [ 21 ]. With a binary nanofeature, the surface absorbs most of the incident light, thus reducing reflection, especially in 300–1000 nm wavelength regime [ 22 , 23 , 24 ]. The binary nanotextured surface also increases the path length of light as it travels through the cell, which in turn enhances energy transformation [ 25 ].…”

Plasma-Polymer-Fluorocarbon Thin Film Coated Nanostructured-Polyethylene Terephthalate Surface with Highly Durable Superhydrophobic and Antireflective Properties

“…However, when light enters a nanoscale structure with dimensions smaller than the wavelength of light, the surface interacts as if it has a gradient refractive index. The light is transmitted to reduce reflection [26,27]. The transmittance and reflectance of nanostructured-PET treated with oxygen plasma for 300 s were 90.5% and 6.7%, respectively, at a wavelength of 550 nm.…”

“…When the PPFC thickness was 100 nm, an excellent improvement in the transmittance and reflectance was observed, and the reflectance was reduced to approximately 54% when compared to that of untreated-PET. The gradient refractive index was calculated using the Bruggeman effective refractive index equation [27].…”

Effect of Urethane Crosslinking by Blocked Isocyanates with Pyrazole-Based Blocking Agents on Rheological and Mechanical Performance of Clearcoats

“…As the first line of defense for automotive bodies, the demand for high-quality clearcoat materials with long endurance and high performance is increasing rapidly. In recent years, smart coating systems having self-healing [10,11], self-cleaning [12], and light-sensitive [13,14] characteristics has been explored to achieve the specialized functionality required for automotive coating systems. Therefore, it is very important to properly develop clearcoats to impart desired characteristics, which sufficiently can satisfy the current industrial and environmental standards.…”