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<p>Room/high-temperature phosphorescence materials have broad application prospects in advanced anti-counterfeiting, flexible displays, and wearable electronic devices. In this study, sodium alginate (SA)-based room/high-temperature phosphorescence materials with multicolor luminescence were prepared by doping 1,4-naphthalenedicarboxylic acid (1,4-H<sub>2</sub>NDC) and the fluorescent dye rhodamine B (RhB) into the SA matrix. The SA-1,4-H<sub>2</sub>NDC system exhibited a yellow-green afterglow lasting 4 s, with an ultralong phosphorescence lifetime of 358 ms under ambient conditions. The ternary system SA-1,4-H<sub>2</sub>NDC-RhB was constructed using SA-1,4-H<sub>2</sub>NDC as the energy donor and RhB as the energy acceptor, and phosphorescence emission in the long-wavelength region was achieved. SA-1,4-H<sub>2</sub>NDC-RhB showed concentration- and time-dependent afterglow color tunability <i>via</i> triplet-to-singlet Förster resonance energy transfer. Notably, the phosphorescences of SA-1,4-H<sub>2</sub>NDC and SA-1,4-H<sub>2</sub>NDC-RhB both exhibited heat resistance in the temperature range of 25–80 °C Large-area flexible SA-1,4-H<sub>2</sub>NDC and SA-1,4-H<sub>2</sub>NDC-RhB films were conveniently fabricated using the solution-blending-coating-drying process. Owing to their excellent mechanical and optical properties, flexible SA-1,4-H<sub>2</sub>NDC and SA-1,4-H<sub>2</sub>NDC-RhB films were successfully applied in flexible displays and information encryption.</p>

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Ultralong Sodium Alginate-based Room/High-temperature Phosphorescence Materials with Color-tunability and Flexibility

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Shao-Chen Sun,
  • Yu-Tong Zhou,
  • Tian-Yu Li,
  • Zhi-Hui Wang,
  • Fa-Rong Tao,
  • Li-Ping Wang,
  • Guang Li

摘要

Room/high-temperature phosphorescence materials have broad application prospects in advanced anti-counterfeiting, flexible displays, and wearable electronic devices. In this study, sodium alginate (SA)-based room/high-temperature phosphorescence materials with multicolor luminescence were prepared by doping 1,4-naphthalenedicarboxylic acid (1,4-H2NDC) and the fluorescent dye rhodamine B (RhB) into the SA matrix. The SA-1,4-H2NDC system exhibited a yellow-green afterglow lasting 4 s, with an ultralong phosphorescence lifetime of 358 ms under ambient conditions. The ternary system SA-1,4-H2NDC-RhB was constructed using SA-1,4-H2NDC as the energy donor and RhB as the energy acceptor, and phosphorescence emission in the long-wavelength region was achieved. SA-1,4-H2NDC-RhB showed concentration- and time-dependent afterglow color tunability via triplet-to-singlet Förster resonance energy transfer. Notably, the phosphorescences of SA-1,4-H2NDC and SA-1,4-H2NDC-RhB both exhibited heat resistance in the temperature range of 25–80 °C Large-area flexible SA-1,4-H2NDC and SA-1,4-H2NDC-RhB films were conveniently fabricated using the solution-blending-coating-drying process. Owing to their excellent mechanical and optical properties, flexible SA-1,4-H2NDC and SA-1,4-H2NDC-RhB films were successfully applied in flexible displays and information encryption.