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.

中文翻译：

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石墨烯量子点薄膜的制备和表征，用于减少通过智能窗的横截面传热

摘要 石墨烯及其衍生物已被报道为具有优异导电性和导热性的材料，可用于各种有前景的应用。特别是，石墨烯基材料的大规模表面涂层可用于最大限度地减少通过玻璃窗的横截面热传递。本研究介绍了一种简便且经济高效的方法，通过浇铸 GQDs 分散体并用聚乙烯吡咯烷酮 (PVP) 稳定，在掺氟氧化锡 (FTO) 玻璃上制造石墨烯量子点 (GQDs) 薄膜。该薄膜具有 GQD 的优异光学性能，并允许超过 80% 的可见光透射率。GQDs 薄膜的存在表明 FTO 玻璃的横截面热扩散率从 0 有效降低。在 4 秒内用激光闪光测量时，55 mm2/s 到零。这种低成本且环保的 GQDs 薄膜将成为智能窗户应用中热管理的有前途的材料。