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Design of amorphous carbon spectral selective coatings

S. S. TINCHEV1,* , P. S. SHARLANDJIEV2, P. I. NIKOLOVA1

Affiliation

  1. Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
  2. CLOSPI, Bulgarian Academy of Sciences, 101 Acad. G. Bontchev Str., 1113 Sofia, Bulgaria

Abstract

Selective coatings are the most important components of solar thermal collectors. They are fabricated usually as cermet composites, by complicated technologies. Recently, we suggested and fabricated spectral selective coatings for thermal solar collectors, based on pure hydrogenated amorphous carbon (a-C:H). However, because of the limited range of variations of the refraction index, it is difficult to achieve optimal absorber properties. In this paper, we present and discuss the design of such an absorber. We estimate the necessary absorber thickness and investigate the possibility of improving its properties by use of nanostructured aluminium substrates..

Keywords

Thin films, Amorphous carbon, Spectral selective coating, Nanostructured substrate..

Submitted at: Nov. 5, 2008
Accepted at: Sept. 9, 2009

Citation

S. S. TINCHEV, P. S. SHARLANDJIEV, P. I. NIKOLOVA, Design of amorphous carbon spectral selective coatings, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 9, pp. 1277-1280 (2009)