Luminescence nanothermometry using a trivalent lanthanide co-doped perovskite.

Area of Science:

• Materials Science
• Nanotechnology
• Luminescence

Background:

• Doping is crucial for tailoring material properties.
• Perovskite nanoparticles offer unique characteristics for advanced applications.

Purpose of the Study:

• Investigate laser-mediated upconversion emission in (Ca$_{0.99- ext{Yb}}_{0.01} ext{Er}_{ }) ext{TiO}_3$ nanoparticles.
• Evaluate the temperature-sensing potential of these synthesized materials.

Main Methods:

• Sol-gel synthesis of (Ca$_{0.99- ext{Yb}}_{0.01} ext{Er}_{ }) ext{TiO}_3$ perovskite nanoparticles.
• X-ray diffractometry (XRD) for structural analysis.
• Upconversion luminescence measurements using a 980 nm laser diode.
• Fluorescence intensity ratio (FIR) algorithm for temperature sensing.

Main Results:

• Synthesized crystalline nanoparticles with an orthorhombic structure.
• Observed temperature-dependent upconversion luminescence from 298 K to 623 K.
• Achieved a maximum sensor sensitivity of 6.71 × 10^-3 K^-1 at 110°C.

Conclusions:

• The synthesized (Ca$_{0.99- ext{Yb}}_{0.01} ext{Er}_{ }) ext{TiO}_3$ nanoparticles show promising upconversion and temperature-sensing properties.
• The fluorescence intensity ratio method is effective for non-contact thermometry in the studied temperature range.