Biomimetics (Oct 2024)

Dual-Coated Antireflective Film for Flexible and Robust Multi-Environmental Optoelectronic Applications

  • Hyuk Jae Jang,
  • Jaemin Jeon,
  • Joo Ho Yun,
  • Iqbal Shudha Tasnim,
  • Soyeon Han,
  • Heeyoung Lee,
  • Sungguk An,
  • Seungbeom Kang,
  • Dongyeon Kim,
  • Young Min Song

DOI
https://doi.org/10.3390/biomimetics9100644
Journal volume & issue
Vol. 9, no. 10
p. 644

Abstract

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Artificial antireflective nanostructured surfaces, inspired by moth eyes, effectively reduce optical losses at interfaces, offering significant advantages in enhancing optical performance in various optoelectronic applications, including solar cells, light-emitting diodes, and cameras. However, their limited flexibility and low surface hardness constrain their broader use. In this study, we introduce a universal antireflective film by integrating nanostructures on both sides of a thin polycarbonate film. One side was thinly coated with Al2O3 for its high hardness, enhancing surface durability while maintaining flexibility. The opposite side was coated with SiO2 to optimize antireflective properties, making the film suitable for diverse environments (i.e., air, water, and adhesives). This dual-coating strategy resulted in a mechanically robust and flexible antireflective film with superior optical properties in various conditions. We demonstrated the universal capabilities of our antireflective film via optical simulations and experiments with the fabricated film in different environments.

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