| Autor: |
De los Reyes GB; Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada. delosrey@ualberta.ca hegmann@ualberta.ca., Dasog M, Na M, Titova LV, Veinot JG, Hegmann FA |
| Jazyk: |
angličtina |
| Zdroj: |
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2015 Nov 28; Vol. 17 (44), pp. 30125-33. Date of Electronic Publication: 2015 Oct 26. |
| DOI: |
10.1039/c5cp04819b |
| Abstrakt: |
We explore the dynamics of blue emission from dodecylamine and ammonia functionalized silicon nanocrystals (Si NCs) with average diameters of ∼3 and ∼6 nm using time-resolved photoluminescence (TRPL) spectroscopy. The Si NCs exhibit nanosecond PL decay dynamics that is independent of NC size and uniform across the emission spectrum. The TRPL measurements reveal complete quenching of core state emission by a charge transfer state that is responsible for the blue PL with a radiative recombination rate of ∼5 × 10(7) s(-1). A detailed picture of the charge transfer state emission dynamics in these functionalized Si NCs is proposed. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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