Photoluminescence properties of the as-prepared CDs.
Sample | λ abs (nm) | ε m (L g−1 cm−1) | λ ex (nm) | λ em (nm) | Stokes shift (nm) | FWHM (nm) | QY (%) |
---|---|---|---|---|---|---|---|
CD1 | 365 | 0.40 | — | — | — | — | — |
CD2 | 357 | 2.28 | 421 | 448 | 27 | 71 | ND |
CD3 | 360 | 1.71 | 440 | 473 | 23 | 90 | 28.8 |
CD4 | 359 | 1.80 | 439 | 474 | 35 | 87 | 40.0 |
CD5 | 360 | 2.23 | 441 | 472 | 31 | 87 | 36.6 |
CD6 | 349 | 5.04 | 449 | 480 | 31 | 98 | 12.1 |
CD7 | 358 | <0.1 | — | — | — | — | — |
CD8 | 356 | 1.83 | 434 | 466 | 32 | 90 | 63.2 |
CD9 | 356 | 2.01 | 437 | 468 | 31 | 90 | 22.4 |
CD10 | 356 | 2.44 | 438 | 468 | 30 | 91 | 24.7 |
CD11 | 356 | 2.21 | 429 | 466 | 37 | 88 | 53.1 |