Optical Properties of Silicon Nanoparticles Prepared by Laser Ablation Method in Various Media

Authors

  • Chu Anh Tuan Institute of Materials Science, Vietnam Academy of Science and Technology and University of Engineering and Technology, Vietnam National University, Hanoi
  • Nguyen Thi Thu Trang Institute of Materials Science, Vietnam Academy of Science and Technology
  • Le Anh Tu Institute of Materials Science, Vietnam Academy of Science and Technology
  • Duong Thi Giang Institute of Materials Science, Vietnam Academy of Science and Technology
  • Pham Hong Duong Institute of Materials Science, Vietnam Academy of Science and Technology
  • Pham Thanh Huy

DOI:

https://doi.org/10.15625/0868-3166/24/3S1/5466

Keywords:

silicon nanoparticles, pulsed laser ablation, time-dependent photoluminescence spectra

Abstract

Bright photoluminescent silicon nanoparticles were successfully fabricated from porous silicon target in air and n-hexane using 532 nm line of YAG:Nd pulsed laser. The whole procedure was carried out at room temperature, in atmosphere. The morphology and composition of as-synthesized nanoparticles were characterized by SEM and EDS measurements. Their optical properties were investigated. The PL peak position of the as-synthesized Si nanoparticle ablated in air is slightly blue-shifted in comparison with those ablated in n-hexane, while it was almost no change of peak position of Si nanoparticles fabricated from p-Si in hexane and original p-Si wafer target. In contrast to PL intensity quenching of original p-Si sample and particles produced in air, those produced in n-hexane solvent exhibited an enhancement. The presence of dangling bonds or energy transfer from excited Si particles to oxygen molecules on the surface can be the cause of the quenching effect.

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Author Biography

Pham Thanh Huy

Advanced Institute for Science and Technology, Hanoi University of
Science and Technology

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Published

13-11-2014

How to Cite

Tuan, C. A., Trang, N. T. T., Tu, L. A., Giang, D. T., Duong, P. H., & Huy, P. T. (2014). Optical Properties of Silicon Nanoparticles Prepared by Laser Ablation Method in Various Media. Communications in Physics, 24(3S1), 143–148. https://doi.org/10.15625/0868-3166/24/3S1/5466

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