Abstract

We have investigated the optical properties of sputter-deposited silver-copper alloy thin films on silicon substrates at room temperature. We found that alloying copper with silver can significantly improve the metal's surface morphology, keeping its infrared reflectivity same as that of pure silver film. However at the same time, it worsens in the blue parts of the spectrum. The reflection in Ag-Cu thin films is interpreted in terms of a simple model describing its trend due to alloying. The experimental results and the speculations reveal a prospect for the improvement and optimization of solar reflectors.

Original languageEnglish (US)
Pages (from-to)538-541
Number of pages4
JournalJOM
Volume65
Issue number4
DOIs
StatePublished - Apr 2013

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Alloying
Silver
Spectroscopy
Silver alloys
Thin films
Copper alloys
Silicon
Surface morphology
Copper
Optical properties
Metals
Infrared radiation
Substrates
Temperature

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

Cite this

Reflectance spectroscopy of functional Ag-Cu thin films : Correlation of reflectivity with Cu content. / Das, Sayantan; Alford, Terry.

In: JOM, Vol. 65, No. 4, 04.2013, p. 538-541.

Research output: Contribution to journalArticle

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AB - We have investigated the optical properties of sputter-deposited silver-copper alloy thin films on silicon substrates at room temperature. We found that alloying copper with silver can significantly improve the metal's surface morphology, keeping its infrared reflectivity same as that of pure silver film. However at the same time, it worsens in the blue parts of the spectrum. The reflection in Ag-Cu thin films is interpreted in terms of a simple model describing its trend due to alloying. The experimental results and the speculations reveal a prospect for the improvement and optimization of solar reflectors.

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