Radio frequency induction welding of silver nanowire networks for transparent heat films

Jisoo Oh, Long Wen, Hyunwoo Tak, Heeju Kim, Gyowun Kim, Jongwoo Hong, Wonjun Jang, Dongwoo Kim, Geunyoung Yeom

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Transparent heat films (THFs) are attracting increasing attention for their usefulness in various applications, such as vehicle windows, outdoor displays, and biosensors. In this study, the effects of induction power and radio frequency on the welding characteristics of silver nanowires (Ag NWs) and Ag NW-based THFs were investigated. The results showed that higher induction frequency and higher power increased the welding of the Ag NWs through the nano-welding at the junctions of the Ag NWs, which produced lower sheet resistance, and improved the adhesion of the Ag NWs. Using the inductive welding condition of 800 kHz and 6 kW for 60 s, 100 ohm/sq of Ag NW thin film with 95% transmittance at 550 nm after induction heating could be decreased to 56.13 ohm/sq, without decreasing the optical transmittance. In addition, induction welding of the Ag NW-based THFs improved haziness, increased bending resistance, enabled higher operating temperature at a given voltage, and improved stability.

Original languageEnglish
Article number4448
Issue number16
StatePublished - 2 Aug 2021

Bibliographical note

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.


  • Induction heating
  • Nano welding
  • Rf frequency
  • Silver nanowires
  • Transparent heat film


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