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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 22087–22094

A close to unity and all-solar-spectrum absorption by ion-sputtering induced Si nanocone arrays

Ying Qiu, Hong-Chen Hao, Jing Zhou, and Ming Lu  »View Author Affiliations


Optics Express, Vol. 20, Issue 20, pp. 22087-22094 (2012)
http://dx.doi.org/10.1364/OE.20.022087


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Abstract

Si nanocone arrays are formed on Si(100) by Ar+ ion sputtering combined with metal ion co-deposition. The aspect ratio of Si cone is found to increases steadily with increasing sample temperature, but decreases slowly with increasing ion dose. Furthermore, the height and base diameter of Si cone increase monotonously with increasing dose at a constant temperature. The absorptivity increases in general with increasing aspect ratio and height. A close to unity and all-solar-spectrum absorption by the nanostructured Si is finally achieved, with the absorbance for λ = 350 to 1100 nm being higher than 96%, and that for λ = 1100 to 2000 nm higher than 92%. Photocurrents for different Si samples are also investigated.

© 2012 OSA

OCIS Codes
(160.4760) Materials : Optical properties
(300.1030) Spectroscopy : Absorption
(160.4236) Materials : Nanomaterials
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Solar Energy

History
Original Manuscript: June 28, 2012
Manuscript Accepted: August 23, 2012
Published: September 12, 2012

Citation
Ying Qiu, Hong-Chen Hao, Jing Zhou, and Ming Lu, "A close to unity and all-solar-spectrum absorption by ion-sputtering induced Si nanocone arrays," Opt. Express 20, 22087-22094 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-20-22087


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