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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 5 — Mar. 3, 2008
  • pp: 2933–2941

Silicon nanoporous pillar array: a silicon hierarchical structure with high light absorption and triple-band photoluminescence

Hai Jun Xu and Xin Jian Li  »View Author Affiliations


Optics Express, Vol. 16, Issue 5, pp. 2933-2941 (2008)
http://dx.doi.org/10.1364/OE.16.002933


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Abstract

A silicon hierarchical structure, silicon nanoporous pillar array (Si-NPA), was prepared by a hydrothermal etching method. The architecture of Si-NPA was characterized to be a regular array of micron-sized, quasi-identical and nanoporous silicon pillars with an additional porous layer beneath the array. The pore walls were proved to be consisted of a SiOx matrix and dispersive silicon nanocrystallites. An integral reflectivity below 4% was achieved in the wavelength range of 240–2400 nm. Three photoluminescence bands, one blue and two red, were observed at room temperature and attributed to the recombination processes through band-to-band transition and luminescent centers, respectively. The structural and physical properties indicate that Si-NPA might be as both a functional silicon nanostructure and a template for assembling silicon-based nanocomposites in fabricating optoelectronic nanodevices.

© 2008 Optical Society of America

OCIS Codes
(160.6000) Materials : Semiconductor materials
(250.5230) Optoelectronics : Photoluminescence
(300.1030) Spectroscopy : Absorption
(310.6860) Thin films : Thin films, optical properties
(160.4236) Materials : Nanomaterials

ToC Category:
Materials

History
Original Manuscript: November 20, 2007
Revised Manuscript: January 26, 2008
Manuscript Accepted: January 27, 2008
Published: February 19, 2008

Citation
Hai Jun Xu and Xin Jian Li, "Silicon nanoporous pillar array: a silicon hierarchical structure with high light absorption and triple-band photoluminescence," Opt. Express 16, 2933-2941 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-5-2933


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