Optical and mechanical properties of Zr-oxide doped TiO2/SiO2 anti-reflective coatings for PV glass covers

Dario F. Zambrano-Mera*, Rodrigo Espinoza-González, Roberto Villarroel, Andreas Rosenkranz, Nicolas Carvajal, María I. Pintor-Monroy, A. Gabriela Montaño-Figueroa, María J. Arellano-Jiménez, Manuel Quevedo-López, Paulina Valenzuela, William Gacitúa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Multi-layer systems are frequently used as anti-reflective coatings (ARCs) due to their excellent optical properties. However, these systems suffer from erosive degradation (wear), thus urgently seeking alternative ways to improve their mechanical properties while maintaining their optical response. To tackle this problem, we propose to dope multi-layer TiO2/SiO2 coatings with Zr-oxides to enhance their crystalline structure and density/compactness, as well as to form Si–Zr–O bonds. We explore the effect of Zr-oxide doping on the microstructure as well as the optical and mechanical properties of multi-layer TiO2/SiO2 coatings with the overall aim to synergistically induce enhanced optical and mechanical properties. Therefore, homogeneous 250 nm thick multi-layer TiO2/SiO2 coatings doped with Zr-oxides (different atomic concentrations) were deposited on glass substrates by magnetron sputtering. Based on our analysis, Zr-doping improves the optical and mechanical properties simultaneously. Among all ARCs, the sample annealed at 400 °C and doped with 1 at.-% Zr presented an excellent anti-reflective behavior and the best mechanical performance. These characteristics point towards an improved mechanical resistance (outstanding durability) and optical efficiency thus rendering them excellent candidates for the protection of glass covers on solar panels.

Original languageEnglish
Article number111784
JournalSolar Energy Materials and Solar Cells
Volume243
DOIs
StatePublished - 15 Aug 2022
Externally publishedYes

Bibliographical note

Funding Information:
Dario F. Zambrano-Mera acknowledges the financial support fundedC by ANID doctoral scholarship ( 21161488 ), Nucleo Milenio Multimat. Fondecyt Project 1191779 and Fondequip EQM 140142 . Also, thank Dr. Carmen González from the Universidad Tecnológica Metropolitana (UTEM) for her collaboration in measurements with ellipsometry and the German Academic Exchange Service (DAAD) for the donation of the ellipsometry equipment. A. Rosenkranz gratefully acknowledges the financial support given by ANID-Chile with the project Fondequip EQ M190057 and Fondecyt Regular 1220331 .

Funding Information:
Dario F. Zambrano-Mera acknowledges the financial support fundedC by ANID doctoral scholarship (21161488), Nucleo Milenio Multimat. Fondecyt Project 1191779 and Fondequip EQM 140142. Also, thank Dr. Carmen González from the Universidad Tecnológica Metropolitana (UTEM) for her collaboration in measurements with ellipsometry and the German Academic Exchange Service (DAAD) for the donation of the ellipsometry equipment. A. Rosenkranz gratefully acknowledges the financial support given by ANID-Chile with the project Fondequip EQ M190057 and Fondecyt Regular 1220331.

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Anti-reflective coatings
  • Mechanical properties
  • Nanoindentation
  • Optical properties
  • PV glass Cover
  • Zr-oxides doping

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