The CIE parameters of Y2O3:4 at% Eu3+, xLi+ (x = 0.5, 1, 3, 5, 7, 9 at%) nanophosphors excited by 254, 393 and 466 nm, respectively.
| Nanophosphor | Excitation wavelength (nm) | Li+-concentration (at%) | CIE-chromaticity coordinates | CCT (K) | Color purity (%) | CIE color | |
|---|---|---|---|---|---|---|---|
| X | Y | ||||||
| Y2O3:4 at% Eu3+, x Li+ | λ ex = 254 | x = 0.5 | 0.546 | 0.439 | 2000.36 | 95.58 | Red |
| x = 1 | 0.568 | 0.420 | 1765.30 | 96.96 | Red | ||
| x = 3 | 0.565 | 0.423 | 1793.56 | 98.18 | Red | ||
| x = 5 | 0.549 | 0.436 | 1961.10 | 96.11 | Red | ||
| x = 7 | 0.608 | 0.385 | 1639.12 | 98.56 | Red | ||
| x = 9 | 0.584 | 0.405 | 1652.62 | 96.98 | Red | ||
| Y2O3:4 at% Eu3+, x Li+ | λ ex = 393 | x = 0.5 | 0.582 | 0.408 | 1666.08 | 96.59 | Red |
| x = 1 | 0.589 | 0.401 | 1634.31 | 97.20 | Red | ||
| x = 3 | 0.596 | 0.395 | 1620.95 | 97.83 | Red | ||
| x = 5 | 0.619 | 0.375 | 1713.88 | 98.89 | Red | ||
| x = 7 | 0.634 | 0.360 | 1946.06 | 98.11 | Red | ||
| x = 9 | 0.643 | 0.354 | 2117.04 | 99.65 | Red | ||
| Y2O3:4 at% Eu3+, x Li+ | λ ex = 466 | x = 0.5 | 0.593 | 0.389 | 1620.24 | 100 | Red |
| x = 1 | 0.588 | 0.396 | 1627.74 | 96.39 | Red | ||
| x = 3 | 0.573 | 0.408 | 1693.05 | 92.37 | Red | ||
| x = 5 | 0.588 | 0.394 | 1625.19 | 93.39 | Red | ||
| x = 7 | 0.615 | 0.372 | 1716.13 | 100 | Red | ||
| x = 9 | 0.599 | 0.386 | 1625.01 | 91.60 | Red | ||