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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S3 — May. 5, 2014
  • pp: A607–A621

Annealing of SnO2 thin films by ultra-short laser pulses

D. Scorticati, A. Illiberi, T. Bor, S.W.H. Eijt, H. Schut, G.R.B.E. Römer, D.F. de Lange, and A.J. Huis in t Veld  »View Author Affiliations


Optics Express, Vol. 22, Issue S3, pp. A607-A621 (2014)
http://dx.doi.org/10.1364/OE.22.00A607


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Abstract

Post-deposition annealing by ultra-short laser pulses can modify the optical properties of SnO2 thin films by means of thermal processing. Industrial grade SnO2 films exhibited improved optical properties after picosecond laser irradiation, at the expense of a slightly increased sheet resistance [Proc. SPIE 8826, 88260I (2013)]. The figure of merit ϕ = T10 / Rsh was increased up to 59% after laser processing. In this paper we study and discuss the causes of this improvement at the atomic scale, which explain the observed decrease of conductivity as well as the observed changes in the refractive index n and extinction coefficient k. It was concluded that the absorbed laser energy affected the optoelectronic properties preferentially in the top 100-200 nm region of the films by several mechanisms, including the modification of the stoichiometry, a slight desorption of dopant atoms (F), adsorption of hydrogen atoms from the atmosphere and the introduction of laser-induced defects, which affect the strain of the film.

© 2014 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(140.7090) Lasers and laser optics : Ultrafast lasers
(350.6050) Other areas of optics : Solar energy
(310.6628) Thin films : Subwavelength structures, nanostructures
(310.7005) Thin films : Transparent conductive coatings

ToC Category:
Materials

History
Original Manuscript: January 8, 2014
Revised Manuscript: February 27, 2014
Manuscript Accepted: February 28, 2014
Published: March 12, 2014

Citation
D. Scorticati, A. Illiberi, T. Bor, S.W.H. Eijt, H. Schut, G.R.B.E. Römer, D.F. de Lange, and A.J. Huis in t Veld, "Annealing of SnO2 thin films by ultra-short laser pulses," Opt. Express 22, A607-A621 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-S3-A607


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