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Issue 44, 2015
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Charge transfer state emission dynamics in blue-emitting functionalized silicon nanocrystals

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Abstract

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 × 107 s−1. A detailed picture of the charge transfer state emission dynamics in these functionalized Si NCs is proposed.

Graphical abstract: Charge transfer state emission dynamics in blue-emitting functionalized silicon nanocrystals

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Supplementary files

Article information


Submitted
13 Aug 2015
Accepted
14 Oct 2015
First published
19 Oct 2015

Phys. Chem. Chem. Phys., 2015,17, 30125-30133
Article type
Paper
Author version available

Charge transfer state emission dynamics in blue-emitting functionalized silicon nanocrystals

G. B. De los Reyes, M. Dasog, M. Na, L. V. Titova, J. G. C. Veinot and F. A. Hegmann, Phys. Chem. Chem. Phys., 2015, 17, 30125
DOI: 10.1039/C5CP04819B

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