Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Porous but Mechanically Robust All-Inorganic Antireflective Coatings Synthesized using Polymers of Intrinsic Microporosity

Journal Article · · ACS Nano
 [1];  [1];  [2];  [2];  [3];  [4];  [1];  [5]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
  2. Univ. of North Texas, Denton, TX (United States). Advance Materials and Manufacturing Processes Institute (AMMPI)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials; Univ. of Chicago, IL (United States). James Frank Institute
Herein, we introduce polymer of intrinsic microporosity 1 (PIM-1) to design single-layer and multilayered all-inorganic antireflective coatings (ARCs) with excellent mechanical properties. Using PIM-1 as a template in sequential infiltration synthesis (SIS), we can fabricate highly uniform, mechanically stable conformal coatings of AlOx with porosities of ~50% and a refractive index of 1.41 compared to 1.76 for nonporous AlOx that is perfectly suited for substrates commonly used in high-end optical systems or touch screens (e.g., sapphire, conductive glass, bendable glass, etc.). We show that such films can be used as a single-layer ARC capable of reduction of the Fresnel reflections of sapphire to as low as 0.1% at 500 nm being deposited only on one side of the substrate. We also demonstrate that deposition of the second layer with higher porosity using block copolymers enables the design of graded-index double-layered coatings. AlOx structures with just two layers and a total thickness of less than 200 nm are capable of reduction of Fresnel reflections under normal illumination to below 0.5% in a broad spectral range with 0.1% reflection at 700 nm. Additionally, and most importantly, we show that highly porous single-layer and graded-index double-layered ARCs are characterized by high hardness and scratch resistivity. The hardness and the maximum reached load were 7.5 GPa and 13 mN with a scratch depth of about 130 nm, respectively, that is very promising for the structures consisting of two porous AlOx layers with 50% and 85% porosities, correspondingly. Such mechanical properties of coatings can also allow their application as protective layers for other optical coatings.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); Office of Naval Research; U.S. Department of Defense (DOD). Vannevar Bush Faculty Fellowship; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1969403
Journal Information:
ACS Nano, Journal Name: ACS Nano Journal Issue: 9 Vol. 16; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (55)

Highly Photoluminescent and Environmentally Stable Perovskite Nanocrystals Templated in Thin Self‐Assembled Block Copolymer Films journal March 2019
Bioinspired Microstructured Materials for Optical and Thermal Regulation journal July 2020
Tailoring the Microporosity of Polymers of Intrinsic Microporosity for Advanced Gas Separation by Atomic Layer Deposition journal March 2021
Polymers of Intrinsic Microporosity (PIMs): Bridging the Void between Microporous and Polymeric Materials journal April 2005
Corrosion resistance and cytotoxicity of a MgF2 coating on biomedical Mg-1Ca alloy via vacuum evaporation deposition method journal April 2013
Mechanical and Compositional Design of High-Strength Corning Gorilla® Glass book January 2018
Surface effects on Young’s modulus and hardness of fused silica by nanoindentation study journal November 2006
Nanomechanical characterization and modeling of anodized porous aluminum oxide thin films with photografted anti-biofouling polymer brushes on their pore walls journal March 2020
Optical and mechanical properties of sol-gel antireflective films for solar energy applications journal August 1999
Effective graded refractive-index anti-reflection coating for high refractive-index polymer ophthalmic lenses journal December 2015
Optimal indium tin oxide layer as anti reflection coating for crystalline silicon solar cell with shallow emitter journal October 2012
Principles of Optics book January 1999
Nondestructive Creation of Ordered Nanopores by Selective Swelling of Block Copolymers: Toward Homoporous Membranes journal June 2016
Reaction–Diffusion Transport Model to Predict Precursor Uptake and Spatial Distribution in Vapor-Phase Infiltration Processes journal June 2021
Atomic Layer Deposition of Metal Fluorides Using HF–Pyridine as the Fluorine Precursor journal March 2016
Vapor Phase Infiltration of Metal Oxides into Nanoporous Polymers for Organic Solvent Separation Membranes journal July 2019
Effect of Nonsolvent Treatments on the Microstructure of PIM-1 journal August 2015
Single-Step Soft-Imprinted Large-Area Nanopatterned Antireflection Coating journal May 2015
Superhydrophobic Antireflection Coating on Glass Using Grass-like Alumina and Fluoropolymer journal October 2020
Swelling-Assisted Sequential Infiltration Synthesis of Nanoporous ZnO Films with Highly Accessible Pores and Their Sensing Potential for Ethanol journal July 2021
Block Copolymer Nanopatterning for Nonsemiconductor Device Applications journal March 2022
Block-Co-polymer-Assisted Synthesis of All Inorganic Highly Porous Heterostructures with Highly Accessible Thermally Stable Functional Centers journal July 2019
Vapor-Phase-Infiltrated AlOx/PIM-1 “Hybrid Scaffolds” as Solution-Processable Amine Supports for CO2 Adsorption journal August 2021
Sequential Infiltration Synthesis for the Design of Low Refractive Index Surface Coatings with Controllable Thickness journal February 2017
New Insight into the Mechanism of Sequential Infiltration Synthesis from Infrared Spectroscopy journal October 2014
Atomic Layer Deposition of MgF 2 Thin Films Using TaF 5 as a Novel Fluorine Source journal August 2008
Thermally Stable Antireflective Coatings Based on Nanoporous Organosilicate Thin Films journal June 2007
Responsive Micellar Films of Amphiphilic Block Copolymer Micelles: Control on Micelle Opening and Closing journal June 2010
Molecular weight dependence of lamellar domain spacing of diblock copolymers in bulk journal September 1990
Polymers of Intrinsic Microporosity Derived from Bis(phenazyl) Monomers journal March 2008
Enhancement of CO 2 Affinity in a Polymer of Intrinsic Microporosity by Amine Modification journal January 2014
Polymers of Intrinsic Microporosity Containing Trifluoromethyl and Phenylsulfone Groups as Materials for Membrane Gas Separation journal December 2008
Silica Nanorod-Array Films with Very Low Refractive Indices journal June 2005
A Route to Nanoscopic Materials via Sequential Infiltration Synthesis on Block Copolymer Templates journal May 2011
Membranes with Highly Ordered Straight Nanopores by Selective Swelling of Fast Perpendicularly Aligned Block Copolymers journal October 2013
Broadband omnidirectional antireflection coating based on subwavelength surface Mie resonators journal January 2012
Optical thin-film materials with low refractive index for broadband elimination of Fresnel reflection journal March 2007
Polymers of intrinsic microporosity as high temperature templates for the formation of nanofibrous oxides journal January 2015
Vapor phase infiltration (VPI) for transforming polymers into organic–inorganic hybrid materials: a critical review of current progress and future challenges journal January 2017
Design of functional composite and all-inorganic nanostructured materials via infiltration of polymer templates with inorganic precursors journal January 2020
Polymers of intrinsic microporosity (PIMs): robust, solution-processable, organic nanoporous materials journal January 2004
Study of a novel ALD process for depositing MgF2 thin films journal January 2007
The chemical physics of sequential infiltration synthesis—A thermodynamic and kinetic perspective journal November 2019
Atomic layer deposition of magnesium fluoride via bis(ethylcyclopentadienyl)magnesium and anhydrous hydrogen fluoride
  • Hennessy, John; Jewell, April D.; Greer, Frank
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 33, Issue 1 https://doi.org/10.1116/1.4901808
journal January 2015
Anti-reflective coating with a conductive indium tin oxide layer on flexible glass substrates journal January 2018
Surface antireflection properties of GaN nanostructures with various effective refractive index profiles journal January 2014
Combined ‘moth-eye’ structured and graded index-layer anti-reflecting coating for high index glasses journal November 2019
Industrial-grade anti-reflection coatings with extreme scratch resistance journal December 2019
Effects of substrate on determination of hardness of thin films by nanoscratch and nanoindentation techniques journal June 2004
Novel technique for measuring the mechanical properties of porous materials by nanoindentation journal March 2006
Wavelength-Selective Coatings on Glass with High Hardness and Damage Resistance journal December 2020
Nanoindentation Hardness and Practical Scratch Resistance in Mechanically Tunable Anti-Reflection Coatings journal February 2021
Single Layer Broadband Anti-Reflective Coatings for Plastic Substrates Produced by Full Wafer and Roll-to-Roll Step-and-Flash Nano-Imprint Lithography journal August 2013
Effect of Polymer Removal on the Morphology and Phase of the Nanoparticles in All-Inorganic Heterostructures Synthesized via Two-Step Polymer Infiltration journal January 2021
Polymers of Intrinsic Microporosity journal December 2012