Recent trends and challenges in developing boride and carbide-based solar absorbers for concentrated solar power

Poobalan, RK and Barshilia, HC and Basu, B (2022) Recent trends and challenges in developing boride and carbide-based solar absorbers for concentrated solar power. In: Solar Energy Materials and Solar Cells, 245 .

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Abstract

Concentrating solar power technology has gained increased attention as a source for clean energy. However, because of low power density, it requires large areas and materials with high photothermal conversion efficiency, to harness solar energy. The solar receiver coated with solar selective material plays a critical role in efficiently converting solar energy to useful power. Because of the moderate solar selective nature and excellent thermal properties, significant efforts are currently being invested on the use of ultra-high temperature ceramics as solar selective absorbers. This literature survey presents a critical review of the research and development of early transition metal boride and carbide-based solar selective absorbers, both in bulk and tandem coating formats. In particular, we have emphasized the use of transition metal borides and carbides as intrinsic absorbers as bulk or even exploiting a multilayer design approach to improve the absorptance in the solar spectrum region. One of the key aspects is to introduce a gradient in optical constants (refractive index, extinction coefficient) to tailor high absorptance and low emissivity in tandem absorber coatings, with insightful understanding into microstructure-optical property correlation. The challenges in developing tandem solar absorbers with long-term thermal stability at mid to high temperature window in different working atmosphere are emphasized to spur the development of next generation spectrally-selective solar absorbers.

Item Type:	Journal Article
Publication:	Solar Energy Materials and Solar Cells
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to the Elsevier B.V.
Keywords:	Carbides; Coatings; Multilayers; Refractive index; Solar absorbers; Solar energy, Absorptance; Clean energy; Concentrated solar power; Metal boride; Multi-layer absorbers; Recent trends; Solar power technologies; Solar selective absorber; Transition metal boride; Transition metals carbides, Transition metals
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Date Deposited:	27 Jul 2022 11:00
Last Modified:	27 Jul 2022 11:00
URI:	https://eprints.iisc.ac.in/id/eprint/74988

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