1：Experimental Design and Method Selection:

The study involves synthesizing YAG:Ti, Eu nanocrystals with varying Eu3+ concentrations using a modified Pechini method, followed by characterization of their structural, morphological, and luminescent properties to understand temperature-dependent behaviors and energy transfers.

2：Sample Selection and Data Sources:

Nanocrystal powders with Eu3+ concentrations of 0.1%, 0.2%, 0.5%, 1%, 2%, and 5% mol relative to Y3+ were prepared. Ti concentration was fixed at 0.1% mol relative to Al3+ based on prior optimization.

3：1%, 2%, 5%, 1%, 2%, and 5% mol relative to Y3+ were prepared. Ti concentration was fixed at 1% mol relative to Al3+ based on prior optimization. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment includes a PANalytical X'Pert Pro diffractometer with Anton Paar TCU 1000 N for XRD, Tecnai G2 20 S/TEM Microscope from FEI Company for TEM, Silver-Nova Super Range TEC Spectrometer from Stellarnet for emission spectra, THMS 600 heating stage from Linkam for temperature control, and FLS980 fluorescence spectrometer from Edinburgh Instruments for decay curves and excitation spectra. Materials include Ti(IV) n-butoxide, 2,4-pentanedione, europium oxide, yttrium oxide, aluminum nitrate hydrate, citric acid, polyethylene glycol, and nitric acid.

4：Experimental Procedures and Operational Workflow:

Synthesis involved mixing starting compounds, drying at 90°C, annealing at 900°C. XRD and TEM were used for structural analysis. Emission spectra were measured under 266 nm excitation with temperature control from -150 to 300°C. Decay curves and excitation spectra were obtained using specified spectrometers and detectors.

5：Data Analysis Methods:

Data analysis included calculating luminescence intensity ratios (LIR1 and LIR2), relative sensitivity using formula S = (1/LIR) * (ΔLIR/ΔT) * 100%, and fitting curves to determine maximum sensitivities and corresponding temperatures.