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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 7, Iss. 3 — Mar. 1, 2009
  • pp: 263–265

Annealing induced refinement on optical transmission and electrical resistivity of indium tin oxide

Wei-Lun Hsu, Cheng-Tao Lin, Tzu-Huan Cheng, Shih-Chiang Yen, Chee-Wee Liu, Din Ping Tsai, and Gong-Ru Lin  »View Author Affiliations


Chinese Optics Letters, Vol. 7, Issue 3, pp. 263-265 (2009)


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Abstract

The effect of annealing condition on sputtered indium tin oxide (ITO) films on quartz with the thickness of 200 nm is characterized to show enhanced optical transparency and optimized electrical contact resistivity. The as-deposited grown ITO film exhibits only 65% and 80% transmittance at 532 and 632.8 nm, respectively. After annealing at 475 oC for 15 min, the ITO film is refined to show improved transmittance at shorter wavelength region. The transmittances of 88.1% at 532 nm and 90.4% at 632.8 nm can be obtained. The 325-nm transmittance of the post-annealed ITO film is greatly increased from 12.7% to 41.9%. Optimized electrical property can be obtained when annealing below 450 oC, leading to a minimum sheet resistance of 26 \Omega/square. Such an ITO film with enhanced ultraviolet (UV) transmittance has become an alternative candidate for applications in current UV photonic devices. The morphology and conductance of the as-deposited and annealed ITO films are determined by using an atomic force microscopy (AFM), showing a great change on the uniformity distribution with finite improvement on the surface conductance of the ITO film after annealing.

© 2009 Chinese Optics Letters

OCIS Codes
(160.4760) Materials : Optical properties
(310.6860) Thin films : Thin films, optical properties
(310.6870) Thin films : Thin films, other properties
(310.7005) Thin films : Transparent conductive coatings

Citation
Wei-Lun Hsu, Cheng-Tao Lin, Tzu-Huan Cheng, Shih-Chiang Yen, Chee-Wee Liu, Din Ping Tsai, and Gong-Ru Lin, "Annealing induced refinement on optical transmission and electrical resistivity of indium tin oxide," Chin. Opt. Lett. 7, 263-265 (2009)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-7-3-263


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