Fabrication of Carbon Nanotube/Indium Tin Oxide "Inverse Tandem" Absorbing Coatings with Tunable Spectral Selectivity for Solar-Thermal Applications

Raj Kumar Bera, Suzanna Azoubel, Subodh Gautam Mhaisalkar, Shlomo Magdassi*, Daniel Mandler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We report the fabrication of a new selective "inverse tandem" absorbing coating based on carbon nanotube (CNT)/indium-tin oxide (ITO) on aluminium (Al) for mid-temperature solar-thermal application. The CNT layer is formed by spraying and functions as an excellent solar absorber whereas the ITO layer produced on top of the CNTs by sputtering serves as an IR reflector. The effect of the thickness of the ITO on the spectral selectivity of the absorbing coating was investigated. Controlling the thickness of ITO allowed the spectral selectivity of the coating to be tuned. The CNT/ITO solar coatings with optimized thickness of ITO showed excellent spectral selectivity values of absorptance (α) of 0.927 and emittance (ε) of 0.2. The performance of the coatings at high temperature after heating in air in the range of 25-300°C for different durations was also investigated. The performance and structure of the CNT/ITO coating was also compared with the wet deposition method in which the ITO coating was formed by spraying.

Original languageAmerican English
Pages (from-to)1045-1050
Number of pages6
JournalEnergy Technology
Volume3
Issue number10
DOIs
StatePublished - 1 Oct 2015

Bibliographical note

Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co.

Keywords

  • Carbon nanotubes
  • Concentrating solar power
  • Indium-tin oxide
  • Solar-thermal energy
  • Spectral selectivity

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