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Fabrication and characterization of graphene quantum dots thin film for reducing cross-sectional heat transfer through smart window

Citation:

Nguyen TD, Yeo LP, Si Yang K, Kei TC, Wang Z, Mandler D, Magdassi S, Tok AIY. Fabrication and characterization of graphene quantum dots thin film for reducing cross-sectional heat transfer through smart window. Materials Research Bulletin [Internet]. 2020;127 :110861 - 110861.

Date Published:

2020/07//

Abstract:

Graphene and its derivatives have been reported as materials with excellent electrical and thermal conductivity, allowing for various promising applications. In particular, the large-scale surface coating of graphene-based materials can be employed to minimize cross-sectional heat transfer through the glass window. This study introduces a facile and cost-effective method to fabricate graphene quantum dots (GQDs) thin film on Fluorine-doped Tin Oxide (FTO) glass via casting of the GQDs dispersion and stabilizing with poly-vinyl-pyrrolidone (PVP). The thin film possesses excellent optical properties of GQDs and allows more than 80% of visible transmittance. The presence of the GQDs thin film shows effective reduction in the cross-sectional thermal diffusivity of FTO glass, from 0.55 mm2/s to zero when measured with laser flash over a 4-second period. This low cost and eco-friendly GQDs thin film will be a promising material for heat management in smart window applications.

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