Abstract
The behavior of the particle size distribution (PSD) during the preparation of sol–gel silica-based antireflective coatings (ARCs) by dip coating was examined. It was found that the PSD after deposition differs dramatically from the PSD in the sol–gel suspensions, with the PSD after deposition being much narrower. A correlation between a decrease in the porosity of the ARC and an increase in the dispersity of the deposited PSD was also found. Hence, controlling the PSD during deposition has a direct effect on the resulting porosity and thus on the reflectance of an ARC. It was found that the temperature and deposition speed during dip coating, respectively, have very little effect on the deposited PSD. It was found that the PSD of the sol–gel suspension control the content of the deposited PSD, but does not change the range of sizes deposited. Finally, it was found that random-uniform particle placement results in elongated sequences of four or more particles, which supports our previous conclusion that the linear permittivity mixing rule is most appropriate for Stöber-based ARCs.
Original language | American English |
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Pages (from-to) | 1103-1113 |
Number of pages | 11 |
Journal | Journal of Coatings Technology Research |
Volume | 13 |
Issue number | 6 |
DOIs | |
State | Published - 1 Nov 2016 |
Bibliographical note
Funding Information:The authors would like to thank the Ring Family Foundation for their generous support of this research. Additionally, the authors would like to thank R. Tamar, J. Aronson, N. Zigdon, and J. Reis for their valuable advice. The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology of the Hebrew University is acknowledged.
Funding Information:
Acknowledgments The authors would like to thank the Ring Family Foundation for their generous support of this research. Additionally, the authors would like to thank R. Tamar, J. Aronson, N. Zigdon, and J. Reis for their valuable advice. The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology of the Hebrew University is acknowledged.
Publisher Copyright:
© 2016, American Coatings Association.
Keywords
- Antireflective coating
- Silica
- Solar
- Sol–gel
- Thin-film