Copper based transparent solar heat rejecting film on glass through in-situ nanocrystal engineering of sputtered TiO2

Nawade, A and Ramya, K and Chakrabortty, S and Bamola, P and Sharma, H and Sharma, M and Chakraborty, K and Ramakrishna, S and Biring, S and Shun Wong, TK and Kumar, A and Mukhopadhyay, S and Dalapati, GK (2022) Copper based transparent solar heat rejecting film on glass through in-situ nanocrystal engineering of sputtered TiO2. In: Ceramics International, 48 (2). pp. 2482-2491.

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Abstract

Sputter grown copper (Cu) and titanium dioxide (TiO2) based transparent solar heat rejecting film has been developed on glass substrates at room temperature for energy saving smart window applications. The performance of as-deposited ultra-thin TiO2/Cu/TiO2 multilayers was elucidated, wherein the visible transmittance of the multilayer significantly depends on the crystal quality of TiO2 layers. In-situ nanocrystal engineering of TiO2 films with optimized sputtering power improves crystallinity of nano-TiO2 domains. The transparent heat regulation (THR) coating with an average transmittance of ∼70% over the visible spectral regime and infra-red reflectance of ∼60% at 1200 nm was developed at room temperature. Optical characterization, X-ray diffraction (XRD), high resolution-transmission electron microscopy (HR-TEM) and atomic force microscopy (AFM) have been utilized to analyze the crystallinity of TiO2 and quality of the multilayered structure. TiO2/Cu/TiO2 based prototype device has been demonstrated for the energy saving smart windows application.

Item Type:	Journal Article
Publication:	Ceramics International
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the Elsevier Ltd
Keywords:	Copper compounds; Crystallinity; Energy conservation; Glass; High resolution transmission electron microscopy; Indium compounds; Multilayers; Nanocrystals; Substrates, Energy savings; Energy-savings; In-situ engineering; Infra red; Infra-red reflection; Nanocrystal engineering; Solar film on glass; TiO2 nanocrystal; TiO2/cu/TiO2; Transparent heat regulation, Titanium dioxide
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	02 Jul 2022 04:57
Last Modified:	02 Jul 2022 04:57
URI:	https://eprints.iisc.ac.in/id/eprint/74066

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