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Morphological investigations of a textured black copper selective coating

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Abstract

The microstructural investigations of a textured black copper selective coating are reported. These surfaces possess remarkably high initial absorptanceα ≃ 0.97 to 0.98 and emittanceɛ 100 ≃ 0.2 ± 0.02. These surfaces reveal a new sponge-like, porous, layered microstructure. They are made of loosely packed long and fine grains which appear randomly distributed. The copper grains are dispersed in a semiconductor oxide matrix. The spacing between these grains is of the order of solar wavelength. Also, these surfaces possess opulent solar selectivity and structural stability up to 250° C in air and under vacuum conditions.

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Authors and Affiliations

  1. Thin Film Laboratory, Physics Department, Indian Institute of Technology, 110016, New Delhi, India

    Purnima Richharia

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  1. Purnima Richharia
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Richharia, P. Morphological investigations of a textured black copper selective coating. J Mater Sci 24, 4034–4036 (1989). https://doi.org/10.1007/BF01168969

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  • DOI: https://doi.org/10.1007/BF01168969

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