Abstract
Surface engineering of silicon nanocrystals directly in water or ethanol by atmospheric-pressure dc microplasma is reported. In both liquids, microplasma processing stabilizes the optoelectronic properties of silicon nanocrystals. The microplasma treatment induces non-equilibrium liquid chemistry that passivates the silicon nanocrystals surface with oxygen-/organic-based terminations. In particular, the microplasma treatment in ethanol drastically enhances the silicon nanocrystals photoluminescence intensity and causes a clear red-shift (≈80 nm) of the photoluminescence maximum. The photoluminescence properties are stable after several days of storage in either ethanol or water. The surface chemistry induced by the microplasma treatment is analyzed and discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 954-964 |
| Number of pages | 11 |
| Journal | Advanced Functional Materials |
| Volume | 22 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 7 Mar 2012 |
Keywords
- microplasma
- photoluminescence
- silicon quantum dots
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