TITLE

Tunable, narrow-band light emission from size-selected Si nanoparticles produced by pulsed-laser ablation

AUTHOR(S)
Orii, Takaaki; Hirasawa, Makoto; Seto, Takafumi
PUB. DATE
October 2003
SOURCE
Applied Physics Letters;10/20/2003, Vol. 83 Issue 16, p3395
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have demonstrated narrow-band visible light emission from size selected silicon nanoparticles (np-Si), with a wavelength controlled by size tuning. The np-Si were synthesized by pulsed-laser ablation of a silicon single-crystal target in high-purity He background gas. A postannealing process improved morphology and crystallinity. Using a differential mobility analyzer, nanoparticles were classified with a diameter tunable from 3 to 6 nm. Monodispersed np-Si deposited on substrate exhibited a sharp photoluminescence band. The energy of this band increased from 1.34 to 1.79 eV with decrease in particle size, and narrowed to approximately 0.22 eV full width at half maximum due to highly resolved size-selection and improvement in crystallinity. The results suggest that tunable, narrow-band light emitting np-Si produced by gas phase synthesis have good possibilities for application as optoelectronic devices. © 2003 American Institute of Physics.
ACCESSION #
11097768

 

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