Table 2. Fitting Parameters of the Time-Resolved PL Spectra of Undoped SrSO4 Nanoplates with Different Excitation Wavelengths When the Detection Wavelength Is Fixed at 418 nm.
| I1 | I2 | I3 | I4 | |||||
|---|---|---|---|---|---|---|---|---|
| excitation wavelength (nm) | detection wavelength (nm) | A0 | τ1 (ns) | τ2 (ns) | τ3 (ns) | τ4 (ns) | ⟨τ⟩ (ns) | χ2 |
| 255 | 418 | 99.116 | 727.60 | 221.97 | 17.64 | none | 35.89 | 1.072 |
| 1.08 | 5.60 | 81.24 | none | |||||
| 320 | 418 | 8.758 | 956.40 | 167.69 | 4.51 | none | 3.80 | 1.036 |
| 1.25 | 5.35 | 21.17 | none | |||||
| 375 | 418 | 7.63 | 47139.8 | 32818.5 | 8114.1 | 401.2 | 3.52 | 1.153 |
| 0.51 | 1.88 | 5.59 | 15.97 |