Elastic broadband antireflection coatings for flexible optics using multi-layered polymer thin films

Zhao, Yineng; Huo, Ni; Ye, Sheng; Tenhaeff, Wyatt E.

doi:10.1039/d3tc00104k

Cited by 5 publications

(1 citation statement)

References 82 publications

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“…Stretchable multilayer antireflection coatings (ARCs) have been demonstrated using compliant and elastic iCVD polymers to minimize reflectance for flexible optical elements. [ 96 ] For these applications, the brittleness of traditional inorganic optical materials, such as MgF 2 , SiO 2 , and Al 2 O 3 , is a significant limitation. Stress in the ARCs can lead to fracturing or film delamination, even for slight changes in strain, temperature, or moisture uptake.…”

Section: Flexible and Stretchable Optical Materialsmentioning

confidence: 99%

Designing Organic and Hybrid Surfaces and Devices with Initiated Chemical Vapor Deposition (iCVD)

Gleason

2023

Advanced Materials

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The initiated Chemical Vapor Deposition (iCVD) technique is an all‐dry method for designing organic and hybrid polymers. Unlike methods utilizing liquids or line‐of‐sight arrival, iCVD provides conformal surface modification over intricate geometries. Uniform, high‐purity, and pinhole‐free iCVD films can be grown with thicknesses ranging from > 15 μm to < 5 nm. The mild conditions permit damage‐free growth directly on to flexible substrates, 2D materials, and liquids. Novel iCVD polymer morphologies include nanostructured surfaces, nanoporosity, and shaped particles. The well‐established fundamentals of iCVD facilitate the systematic design and optimization of polymers and copolymers. The functional groups provide fine tuning of surface energy, surface charge, and responsive behavior. Further reactions of the functional groups in the polymers can yield either surface modification, compositional gradients through the layer thickness, or complete chemical conversion of the bulk film. The iCVD polymers have been integrated into multilayer device structures as desired for applications in sensing, electronics, optics, electrochemical energy storage, and biotechnology. For these devices, hybrids offer higher values of refractive index and dielectric constant. Multivinyl monomers typically produce ultrasmooth and pinhole‐free and mechanically deformable layers and robust interfaces which are especially promising for electronic skins and wearable optoelectronics.This article is protected by copyright. All rights reserved

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Section: Flexible and Stretchable Optical Materialsmentioning

confidence: 99%

Designing Organic and Hybrid Surfaces and Devices with Initiated Chemical Vapor Deposition (iCVD)

Gleason

2023

Advanced Materials

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Synthesis of High Refractive Index Polymer Thin Films for Soft, Flexible Optics Through Halomethane Quaternization of Poly(4‐Vinylpyridine)

Huo,

Rivkin,

Jia

et al. 2024

Advanced Optical Materials

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Applications in soft, flexible optical, and optoelectronic applications demand polymer thin film coatings that can accommodate substantial physical deformations. The preparation of high refractive index polymers (HRIPs) through the quaternization of poly(4‐vinylpyridine) (P4VP) thin films with (di)halomethanes is presented. P4VP thin films are prepared by initiated chemical vapor deposition (iCVD) and then quaternized through exposure to saturated vapors of iodomethane (CH3I), dibromomethane (CH2Br2), and diiodomethane (CH2I2), resulting in refractive indices (RI) as high as 1.67, 1.71, and 2.07, respectively (at 632.8 nm). Fourier‐transform infrared (FTIR) spectroscopy and X‐ray photoelectron spectroscopy (XPS) confirmed the quaternization of pyridine pendant groups on the polymer chain to n‐methylpyridinium with primarily an iodide or bromide counterion, though a minor fraction of polyiodides are also detected. Additionally, these films demonstrate superior thermal stability, retaining their refractive index and thickness after thermal excursions to 200 °C. The halogenated P4VP films exhibit superior mechanical flexibility relative to conventional inorganic coatings (Al2O3 and Ta2O5) and do not fracture at uniaxial tensile strains as high as 10%. This new material chemistry and fabrication approach method may enable advanced optical designs and functionality in a wide range of substrates and device architectures.

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Environmentally Friendly Approach for the Plasma Surface Modification of Fabrics for Improved Fog Harvesting Performance

Gürsoy,

Kocadayıoğulları

2023

Fibers Polym

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Elastic broadband antireflection coatings for flexible optics using multi-layered polymer thin films

Abstract: Flexible optics and optoelectronic devices require stretchable and compliant antireflection coatings (ARC). Conventional optical coatings, typically inorganic thin films, are brittle and crack under strain, while porous or patterned surfaces...

Cited by 5 publications

References 82 publications

Designing Organic and Hybrid Surfaces and Devices with Initiated Chemical Vapor Deposition (iCVD)

Designing Organic and Hybrid Surfaces and Devices with Initiated Chemical Vapor Deposition (iCVD)

Synthesis of High Refractive Index Polymer Thin Films for Soft, Flexible Optics Through Halomethane Quaternization of Poly(4‐Vinylpyridine)

Environmentally Friendly Approach for the Plasma Surface Modification of Fabrics for Improved Fog Harvesting Performance

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