Table 6.
Luminescence lifetime of the Pr3+ 1D2 → 3H4 emission transition at RT for Y2O3: Pr3+ NCs synthetized by solvothermal method a.
| Entry | Alcohol | T (°C) | Calcination T (°C)/Time (h) | Observations | τ (1D2)/µs |
|---|---|---|---|---|---|
| 1 | EG | 180 | 800/4 | Aggregation; 31(7) nm (TEM), 21(1) nm (PXRD); organic layer. | 198 |
| 2 | EG | 180 | 900/4 | Slight aggregation; 42(11) nm (TEM), 31.1(3) nm (PXRD). | 202 |
| 3 b | EG | 180 | 900/4 | Strong aggregation; 40(10) nm (TEM), 43.1(3) nm (PXRD). | 144 |
| 4 | EtOH | 180 | 900/4 | Strong aggregation; 28(10) nm. | 163 |
| 5 | EG | 180 | 900/8 | Strong aggregation. | 135 |
| 6 | EG | 220 | 900/4 | Slight aggregation; 47(12) nm. | 223 |
| 7 | EG | 220 | 1000/4 | Slight aggregation; 68(15) nm (TEM), 52.8(5) nm (PXRD). | 216 |
a 7.848 mmol RE. b 15.696 mmol RE.