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

Tam D. Nguyen, Loo Pin Yeo, Kiw Si Yang, Tan Chiew Kei, Zhiwei Wang, Daniel Mandler, Shlomo Magdassi, Alfred Iing Yoong Tok

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)


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.

Original languageEnglish
Article number110861
Number of pages8
JournalMaterials Research Bulletin
Publication statusPublished - Jul 2020
Externally publishedYes


  • Cross-Sectional heat transfer
  • Graphene quantum dots
  • Poly-Vinyl-Pyrrolidone
  • Smart window
  • Visible transmittance

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