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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 36, Iss. 20 — Oct. 15, 2011
  • pp: 4026–4028

Surfactant-free solution-dispersible Si nanocrystals surface modification by impurity control

Masatoshi Fukuda, Minoru Fujii, Hiroshi Sugimoto, Kenji Imakita, and Shinji Hayashi  »View Author Affiliations


Optics Letters, Vol. 36, Issue 20, pp. 4026-4028 (2011)
http://dx.doi.org/10.1364/OL.36.004026


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Abstract

Si nanocrystals (Si-NCs) dispersible in polar liquid without surface functionalization by organic molecules have been realized by simultaneously doping n and p type impurities. We show that the codoped Si-NCs are stable in methanol for more than five months, while intrinsic Si-NCs prepared by the same procedure form large agglomerates. The different behavior of the intrinsic and codoped Si-NCs in solutions suggests that doped impurities exist on the surface of Si-NCs and the surface potential is large enough to prevent the agglomeration. The colloidal solution of codoped Si-NCs exhibits broad photoluminescence with the maximum in the near infrared range ( 1.1 – 1.3   eV ).

© 2011 Optical Society of America

OCIS Codes
(160.6000) Materials : Semiconductor materials
(250.5230) Optoelectronics : Photoluminescence

ToC Category:
Materials

History
Original Manuscript: July 19, 2011
Revised Manuscript: September 7, 2011
Manuscript Accepted: September 8, 2011
Published: October 7, 2011

Citation
Masatoshi Fukuda, Minoru Fujii, Hiroshi Sugimoto, Kenji Imakita, and Shinji Hayashi, "Surfactant-free solution-dispersible Si nanocrystals surface modification by impurity control," Opt. Lett. 36, 4026-4028 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-20-4026

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