Porous but Mechanically Robust All-Inorganic Antireflective Coatings Synthesized using Polymers of Intrinsic Microporosity
Abstract
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 andmore »
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
- Univ. of North Texas, Denton, TX (United States). Advance Materials and Manufacturing Processes Institute (AMMPI)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
- Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials; Univ. of Chicago, IL (United States). James Frank Institute
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); U.S. Department of Defense (DOD). Vannevar Bush Faculty Fellowship; US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF)
- OSTI Identifier:
- 1969403
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Nano
- Additional Journal Information:
- Journal Volume: 16; Journal Issue: 9; Journal ID: ISSN 1936-0851
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; anti-reflective coatings; optical coating; low refractive index; porous alumina; polymer of intrinsic microporosity; PIM-1; sequential infiltration synthesis; coating materials; deposition; layers; optical properties; porosity
Citation Formats
Ji, Cheng, Zhang, Zhongbo, Omotosho, Khalil D., Berman, Diana, Lee, Byeongdu, Divan, Ralu, Guha, Supratik, and Shevchenko, Elena V. Porous but Mechanically Robust All-Inorganic Antireflective Coatings Synthesized using Polymers of Intrinsic Microporosity. United States: N. p., 2022.
Web. doi:10.1021/acsnano.2c05592.
Ji, Cheng, Zhang, Zhongbo, Omotosho, Khalil D., Berman, Diana, Lee, Byeongdu, Divan, Ralu, Guha, Supratik, & Shevchenko, Elena V. Porous but Mechanically Robust All-Inorganic Antireflective Coatings Synthesized using Polymers of Intrinsic Microporosity. United States. https://doi.org/10.1021/acsnano.2c05592
Ji, Cheng, Zhang, Zhongbo, Omotosho, Khalil D., Berman, Diana, Lee, Byeongdu, Divan, Ralu, Guha, Supratik, and Shevchenko, Elena V. Thu .
"Porous but Mechanically Robust All-Inorganic Antireflective Coatings Synthesized using Polymers of Intrinsic Microporosity". United States. https://doi.org/10.1021/acsnano.2c05592. https://www.osti.gov/servlets/purl/1969403.
@article{osti_1969403,
title = {Porous but Mechanically Robust All-Inorganic Antireflective Coatings Synthesized using Polymers of Intrinsic Microporosity},
author = {Ji, Cheng and Zhang, Zhongbo and Omotosho, Khalil D. and Berman, Diana and Lee, Byeongdu and Divan, Ralu and Guha, Supratik and Shevchenko, Elena V.},
abstractNote = {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.},
doi = {10.1021/acsnano.2c05592},
journal = {ACS Nano},
number = 9,
volume = 16,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2022},
month = {Thu Sep 01 00:00:00 EDT 2022}
}
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