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Nano Research

, Volume 11, Issue 3, pp 1699–1713 | Cite as

Mechanically robust antireflective coatings

  • Sadaf Bashir Khan
  • Hui Wu
  • Xiaochen Huai
  • Sumeng Zou
  • Yuehua Liu
  • Zhengjun ZhangEmail author
Research Article

Abstract

Mechanical strength is an essential parameter that influences and limits the lifetime performance of antireflective (AR) coatings in optical devices. Specifically, amphiphobic AR coatings with reduced reflectance are of great significance as they considerably enlarge the range of fundamental applications. Herein, we describe the design and fabrication of amphiphobic AR coatings with reduced reflectance and enhanced mechanical resilience. Introducing a thin polytetrafluoroethylene (PTFE) layer on top of the bilayer SiO2 coating via vapor deposition method makes it highly liquid repellent. We achieved reduced reflectance (< 1%) over the entire visible wavelength range, as well as tunability according to the desired wavelength region. The fabricated film showed better thermal stability (up to 300 °C) with stable AR efficiency, when an ultrathin dense coat of Al2O3 was deposited via atomic layer deposition (ALD) on the polymer-based bilayer SiO2 antireflective coating (P-BSAR). The experimental results prove that the omnidirectional AR coating in this study exhibits multifunctional properties and should be suitable for the production of protective optical equipment and biocompatible polymer films for the displays of portable electronic devices.

Keywords

antireflection (AR) super-liquid repellency thin films thermally stable mechanically robust adhesion 

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Notes

Acknowledgements

The authors are grateful to the financial support by the National Basic Research Program of China (973 program, No. 2013CB934301), the National Natural Science Foundation of China (Nos. 51531006 and 51572148), the Research Project of Chinese Ministry of Education (No. 113007A), and the Tsinghua University Initiative Scientific Research Program.

Supplementary material

12274_2017_1787_MOESM1_ESM.pdf (4.9 mb)
Mechanically robust antireflective coatings

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany 2018

Authors and Affiliations

  • Sadaf Bashir Khan
    • 1
  • Hui Wu
    • 1
  • Xiaochen Huai
    • 1
  • Sumeng Zou
    • 1
  • Yuehua Liu
    • 1
  • Zhengjun Zhang
    • 2
    Email author
  1. 1.The State Key Laboratory for New Ceramics & Fine Processing, School of Materials Science & EngineeringTsinghua UniversityBeijingChina
  2. 2.Advanced Key Laboratory for New Ceramics, School of Materials Science & EngineeringTsinghua UniversityBeijingChina

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