Thin films of silica-carbon nanocomposites for selective solar absorbers

Dahn Katzen, Esthy Levy, Yitzhak Mastai

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

In this paper, we describe new film structures based on porous silica and nanosized carbon for selective solar absorbers application. The films show high absorbance in the solar-spectral region and low emittance in the IR region. The best results for 1000 nm thick films of nanocomposite silica-carbon has excellent optical parameters, absorbance α s = 0.94 and IR emissivity of ε = 0.15. The films show good stability under the influence of humidity and high temperatures (250-300 °C). This new solar absorber structure offers low cost production and both the materials are easily available and non-toxic. The overall process of film preparation is simple and works under "green-chemistry" conditions.

Original languageEnglish
Pages (from-to)514-517
Number of pages4
JournalApplied Surface Science
Volume248
Issue number1-4
DOIs
StatePublished - 30 Jul 2005

Keywords

  • Nanocomposites
  • Porous silica
  • Selective solar absorber

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