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<p>Silver nanowire (Ag NW)-based flexible transparent conductive thin films (FTCFs) are attractive for flexible optoelectronics, but their poor thermal stability severely limits practical applications. Here, high-temperature-resistant FTCFs were fabricated using MgO-coated Ag nanowires (MgO@Ag NWs) embedded in a colorless polyimide (cPI) matrix. The ultrathin MgO shell effectively suppresses the thermal instability of Ag NWs, while the partially embedded cPI structure improves junction contact, mechanical durability, and interfacial adhesion. The MgO@Ag NW FTCFs exhibit sheet resistance of 9.1 Ω/sq, transmittance of 85.4% at 550&#xa0;nm, and a figure of merit of 251. Notably, the FTCFs maintain nearly unchanged electrical and optical performance after annealing at 300°C for 2&#xa0;h in air. They also show excellent bending stability and strong resistance to tape-peeling and ultrasonication. The enhanced performance is attributed to the synergistic effect of MgO shell protection and cPI embedding, which suppresses nanowire coalescence and stabilizes the conductive network. This work provides a simple and effective route for developing high-temperature-resistant FTCFs for advanced flexible optoelectronic applications.</p>

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Flexible Transparent Conductive Films with High Transparency, Low Resistance, and Thermal Stability up to 300°C Enabled by MgO@Ag Nanowires

  • 期刊论文

  • 发表日期：

    2026年8月5日

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  • Ming Liu,
  • Xiaoying Xu,
  • Min Shi,
  • Xuanxu Pei,
  • Jun Xie,
  • Wei Guo,
  • Pingwei Zhang,
  • Hang Zhou,
  • Yangfan Guo,
  • Pengcheng Li,
  • Shihui Yu

摘要

Silver nanowire (Ag NW)-based flexible transparent conductive thin films (FTCFs) are attractive for flexible optoelectronics, but their poor thermal stability severely limits practical applications. Here, high-temperature-resistant FTCFs were fabricated using MgO-coated Ag nanowires (MgO@Ag NWs) embedded in a colorless polyimide (cPI) matrix. The ultrathin MgO shell effectively suppresses the thermal instability of Ag NWs, while the partially embedded cPI structure improves junction contact, mechanical durability, and interfacial adhesion. The MgO@Ag NW FTCFs exhibit sheet resistance of 9.1 Ω/sq, transmittance of 85.4% at 550 nm, and a figure of merit of 251. Notably, the FTCFs maintain nearly unchanged electrical and optical performance after annealing at 300°C for 2 h in air. They also show excellent bending stability and strong resistance to tape-peeling and ultrasonication. The enhanced performance is attributed to the synergistic effect of MgO shell protection and cPI embedding, which suppresses nanowire coalescence and stabilizes the conductive network. This work provides a simple and effective route for developing high-temperature-resistant FTCFs for advanced flexible optoelectronic applications.