On the synthesis, spectroscopic and temperature sensing properties of Y2Ge2O7:Yb3+,Nd3+,Tm3+ and Y2Ge2O7:Bi2+,Yb3+,Nd3+

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Abstract

Yb³⁺/Nd³⁺/Tm³⁺ and Bi³⁺/Yb³⁺/Nd³⁺ doped Y₂Ge₂O₇ nanocrystalline phosphors, synthesized via solid-state reaction, are presented for non-invasive ratiometric temperature sensing. Under 804 nm excitation, these materials exhibit intense emissions suitable for biomedical applications, with Nd³⁺ and Bi³⁺ acting as efficient sensitizers to enhance up-conversion. Temperature-dependent studies within the 20 °C to 60 °C range indicate moderate absolute (Sa) and relative (Sr) sensitivities based on luminescence intensity ratios (LIR) of stark sublevels.

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Programme
14:00 to 15:30 on 09/16/2026
Room 4 and 5
Institutions
  • 1 Federal University of Goiás
Track
  • TL02 - Solid-State Inorganic Materials and Nanomaterials
Keywords
rare-earth
luminescence
thermometry