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Sun, Wei ; Qian, Chenxi ; Wang, Liwei ; Wei, Muan ; Mastronardi, Melanie L. ; Casillas, Gilberto ; Breu, Josef ; Ozin, Geoffrey A.:
Switching-On Quantum Size Effects in Silicon Nanocrystals.
In: Advanced Materials.
Bd. 27
(2015)
Heft 4
.
- S. 746-749.
ISSN 1521-4095
DOI: https://doi.org/10.1002/adma.201403552
Abstract
The size‐dependence of the absolute luminescence quantum yield of size‐separated silicon nanocrystals reveals a “volcano” behavior, which switches on around 5 nm, peaks at near 3.7–3.9 nm, and decreases thereafter. These three regions respectively define: i) the transition from bulk to strongly quantum confined emissive silicon, ii) increasing confinement enhancing radiative recombination, and iii) increasing contributions favoring non‐radiative recombination.