Breakthrough in Nanotechnology: Suppressing Thermal Quenching in Rare-Earth-Doped Materials

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Research investigators from Shaanxi Normal University in Xi'an, People's Republic of China, have discovered a novel approach to suppressing thermal quenching in rare-earth-doped materials. Thermal quenching, a decrease in up-conversion luminescence intensity with rising temperature, has long been a significant challenge in the development of lighting, display, and laser technology applications. By strategically doping Nd ions into NaYF:Yb/Er nanoparticles, the researchers achieved efficient suppression of thermal quenching under relatively high excitation power. This breakthrough is attributed to the bidirectional energy transfer between Er and Nd ions, which alleviates excited-state population saturation in Er ions and enhances thermal stability.

Key Takeaways:

  • The researchers from Shaanxi Normal University developed a novel approach to suppressing thermal quenching in rare-earth-doped materials by doping Nd ions into NaYF:Yb/Er nanoparticles.
  • The bidirectional energy transfer between Er and Nd ions is responsible for the suppression of thermal quenching, which is attributed to the alleviation of excited-state population saturation in Er ions and the enhancement of thermal stability.
  • The study demonstrated that zero thermal quenching of luminescence was observed within a specific excitation power range, where the emission intensity remained nearly constant with increasing temperature.
  • The researchers found that the suppression of thermal quenching is power-dependent, showing prolonged emission lifetimes in tridoped systems under high power.
  • The study provides a novel concept for developing new luminescent materials with superior abnormal thermal quenching characteristics.
  • The research has been peer-reviewed and published in The Journal of Physical Chemistry Letters.
  • The study was conducted by Yanzhen Xiao, Xiaojun Guo, Sihan Wang, Zhengkun Fu, and Zhenglong Zhang.

Statistics:

  • up to 10974 nm: The emission intensity remains nearly constant with increasing temperature within a specific excitation power range.
  • 10969-10974: The research article is published in The Journal of Physical Chemistry Letters.
  • 2025: The research was published in 2025.
  • 475: The Nanotechnology Weekly article is on page 475.
  • 3: The research involves three stages: low power, high power, and tridoped systems.
  • 1: The researchers used only NaYF:Yb/Er nanoparticles in their study.
  • 16th: The address of the American Chemical Society is 1155 16th Street, NW, Washington, DC 20036.

Sources:

  • Bidirectional Energy Transfer-Induced Suppression of Thermal Quenching in Nd3+ Codoped NaYF4:Yb3+/Er3+ Nanoparticles. The Journal of Physical Chemistry Letters, 2025:10969-10974.
  • Nanotechnology Weekly. October 27, 2025; p 475.
  • Shaanxi Normal University. School of Physics and Information Technology, Xi'an 710119, People's Republic of China.
  • The Journal of Physical Chemistry Letters. Amer Chemical Soc, 1155 16th Street, NW, Washington, DC 20036, USA.