1：Experimental Design and Method Selection:

The study involved synthesizing lanthanide-doped Y2O3 nanoparticles using the citrate complexation method, annealing at 800°C, and preparing binary mixtures by physical grinding. Luminescence properties were analyzed under various excitations and temperatures.

2：Sample Selection and Data Sources:

Nanoparticles of 1% Nd, Ho, and Er doped Y2O3 were synthesized; binary mixtures (Ho-Y2O3 + Nd-Y2O3 and Ho-Y2O3 + Er-Y2O3) with different weight ratios were prepared.

3：List of Experimental Equipment and Materials:

Equipment included X-ray diffractometer (Schimadzu XRD-7000), Raman spectrometer (Horiba Jobin Yvon - Labram HR UV-Visible-NIR), diffuse reflectance spectrometer (AvaSpec-HS1024x58/122TEC with AvaSphere-50-LS-HAL-12V), tunable laser (NT340 Series EKSPLA OPO), spectrographs (Shamrock 303i, Andor; Acton SP2758), detectors (iDus InGaAs

4：7 DU490A, AvaSpec-NIR256-7TEC, NIR PMT module H10330B-75, Hamamatsu), temperature stage (Microptik MHCS622), and chemicals (lanthanide nitrates, citric acid). Experimental Procedures and Operational Workflow:

Nanoparticles were synthesized, characterized by XRD, Raman, and DR-UV/Vis spectroscopy. Luminescence spectra and decays were measured at temperatures from 297 to 472 K using pulsed laser excitation. Data were acquired in high-resolution and low-resolution modes.

5：Data Analysis Methods:

Luminescence intensity ratios (LIR) and lifetimes were calculated; relative sensitivity was estimated using standard formulas. Statistical analysis involved fitting and error estimation.