| Record number | 435914 |
|---|---|
| Title | Microscopic Origin of the Fast Blue-Green Luminescence from Chemically Synthesized Non-Oxidized Silicon Quantum Dots |
| Author(s) | Dohnalová, K.; Gregorkiewicz, T.; Fucíková, A.; Valenta, J.; Umesh, C.; Paulusse, J.M.J.; Zuilhof, H.; Humpolícková, J.; Hof, M. van |
| Source | Small 8 (2012)20. - ISSN 1613-6810 - p. 3185 - 3191. |
| DOI | http://dx.doi.org/10.1002/smll.201200477 |
| Department(s) |
Laboratory for Organic Chemistry VLAG |
| Publication type | Refereed Article in a scientific journal |
| Publication year | 2012 |
| Keyword(s) | light-emission - confinement regime - electronic states - si nanocrystals - porous silicon - photoluminescence - nanoparticles - alkyl - nanoclusters - spectroscopy |
| Abstract | The microscopic origin of the bright nanosecond blue-green photoluminescence (PL), frequently reported for synthesized organically terminated Si quantum dots (Si-QDs), has not been fully resolved, hampering potential applications of this interesting material. Here a comprehensive study of the PL from alkyl-terminated Si-QDs of 2-3 nm size, prepared by wet chemical synthesis is reported. Results obtained on the ensemble and those from the single nano-object level are compared, and they provide conclusive evidence that efficient and tunable emission arises due to radiative recombination of electron-hole pairs confined in the Si-QDs. This understanding paves the way towards applications of chemical synthesis for the development of Si-QDs with tunable sizes and bandgaps. |
| Comments |
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