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Moth-eye-like antireflection coatings based on close-packed solid/hollow silica nanospheres

  • Xiaoling Zhang
  • Qing Lu
  • Yuan Cheng
  • Liyue Liu
  • Yongkui Shan
  • Ganghua Zhang
  • Dezeng LiEmail author
Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)

Abstract

Broadband antireflection coatings (ARCs) attract increasing attentions due to the effective reduction of reflection between the interface of air and substrates over a broad range of wavelengths. Moth-eye-like array ARCs with high antireflection performance have been successfully fabricated via a facile and low-cost sol–gel method using solid silica nanospheres (SSNSs) and hollow silica nanospheres (HSNSs). The composite of SSNSs and HSNSs was closely arranged on the glass substrate to firstly construct the close-packed solid/hollow silica nanospheres (c-S/HSNSs) array, in which HSNSs were used to regulate the refractive index and many triangular grooves among adjacent nanospheres were formed. Then moth-eye-like array structure was obtained by locating the nanospheres on the groove positions in c-S/HSNSs array. The transmittance of glass substrates with moth-eye-like array structure has been increased from 91.0% to 99.0%, with an average solar transmittance of 97.8%. The reflection of glass substrates with moth-eye-like array structure was prominently reduced in wide-angle incidence, and the minimum reflectance changed from 0.17% to 1.34% within 8 to 60°. The moth-eye-like array structure exhibits the high antireflection performance and excellent thermal stability and is promising in photovoltaic modules, optical lenses, and other outdoor applications.

Graphical abstract includes the process of preparation (left) and SEM images of morphologies and structures of moth-eye-like array, in which the inset is the crosssectional structure of moth-eye-like array (middle), and the transmittance of moth-eyelike array and c-S/HSNSs array in the range of 350–800 nm (right).

Highlights

  • The close-packed solid/hollow silica nanospheres (c-S/HSNSs) array was constructed by assembling the solid and hollow silica nanospheres on the glass substrate.

  • Moth-eye-like array antireflection coatings based on c-S/HSNSs array have been obtained with excellent performance.

  • The transmittance of glass substrates with the moth-eye-like array structure reaches 99.0%, with an average solar transmittance of 97.8%.

  • The minimum reflection of moth-eye-like array structure changes 0.17% to 1.34% within the scope of 8 to 60°.

Keywords

Antireflection coatings Moth-eye-like Close-packed Hollow silica nanospheres Layer-by-layer assembly 

Notes

Acknowledgements

The authors are grateful for financial support from National Natural Science Foundation of China (No. 61205177).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Xiaoling Zhang
    • 1
  • Qing Lu
    • 1
  • Yuan Cheng
    • 1
  • Liyue Liu
    • 1
  • Yongkui Shan
    • 1
  • Ganghua Zhang
    • 2
  • Dezeng Li
    • 1
    Email author
  1. 1.School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghaiP. R. China
  2. 2.Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Research Institute of MaterialsShanghaiP. R. China

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