Shifting of the absorption edge in TiB2/TiB(N)/Si3N4 solar selective coating for enhanced photothermal conversion

Dan, Atasi and Chattopadhyay, Kamanio and Barshilia, Harish C and Basu, Bikramjit (2018) Shifting of the absorption edge in TiB2/TiB(N)/Si3N4 solar selective coating for enhanced photothermal conversion. In: SOLAR ENERGY, 173 . pp. 192-200.

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Abstract

The concentrated solar power systems for solar energy applications demand the development of solar absorber coatings with high spectral selectivity. This is possible by careful compositional selection of absorber thin films with an aim to shift the optical absorption edge towards higher wavelength side. In this context, the present work aims at developing such a coating, based on TiB2/TiB(N)/Si3N4 by tailoring magnetron sputtering parameters. This multilayer exhibits a high absorptance of 0.964 and a moderately low emittance of 0.18 at 82 degrees C. The attainment of excellent spectral selectivity has been explained in terms of systematic variation or gradient in refractive index and extinction co-efficient throughout the multilayer stack.

Item Type:	Journal Article
Publication:	SOLAR ENERGY
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright of this article belongs to PERGAMON-ELSEVIER SCIENCE LTD
Keywords:	Spectrally selective absorber; Magnetron sputtering; Thin films; Spectroscopic ellipsometry
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	24 Jan 2019 10:12
Last Modified:	24 Jan 2019 10:12
URI:	http://eprints.iisc.ac.in/id/eprint/61402

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