Journal
CHEMICAL PHYSICS LETTERS
Volume 674, Issue -, Pages 90-97Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2017.02.060
Keywords
Si nanoparticle; Pulsed laser ablation; Visible photoluminescence
Funding
- Funding Program for Next Generation World-Leading Researchers of the Japan Society for the Promotion of Science (JSPS) [GR073]
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [15H02001]
- PRESTO (Structure Control and Function program) of the Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [15H02001] Funding Source: KAKEN
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Pulsed-laser ablation of silicon (Si) was conducted in six different organic solvents using a nanosecond laser. Si nanoparticles (Si -NPs) that exhibited blue photoluminescence (PL) were generated in all the solvents, but a significant solvent dependence emerged: particle size, PL spectra, and PL quantum yield (QY). The results of solvent dependence were well characterized using an atomic ratio in a solvent molecule. The highest QY was observed for the smallest Si -NPs (ca. 2 nm) synthesized in 1-octyne. The QY was enhanced by aging in 1-octyne, and its mechanism was attributed to alkyl passivation of dangling bonds on the Si -NPs. (C) 2017 Elsevier B.V. All rights reserved.
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