Irradiation Effect on Ta2O5 Thin Films

Nilgun Baydogan; B. Erkan; A.B. Tugrul; H. Çimenoğlu

doi:10.4028/www.scientific.net/DDF.353.205

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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 353Irradiation Effect on Ta2O5 Thin Films

Irradiation Effect on Ta₂O₅ Thin Films

Abstract:

Long-term effects of time-dependent solarization behavior on optical density and optical band gap of the gamma and beta irradiated Ta₂O₅ thin films were investigated to examine the optical aging of films at different absorbed dose levels. Irradiation process caused to induce defect centres. The population inversion of the colour centres was increased by controlling the absorbed dose at certain radiation dose levels. The efficient absorption of photons in tantalum reduced transmittance. The grain boundaries of the Ta₂O₅ thin film decreased at the end of irradiation process. The average grain boundaries changed after the irradiation process at 4.5 kGy and average grain boundaries decreased from ~ 11.5 to 5.5 μm. The optical fading behavior of induced color centers addressed to the potential opportunities of Ta₂O₅ thin film by monitoring absorption of photons in optoelectronic technology. Optical fading of the Ta₂O₅ thin film presented an importance to investigate the material stored ionizing radiation dose in it with the increase of elapsed time after the irradiation treatment.

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Periodical:

Defect and Diffusion Forum (Volume 353)

Pages:

205-210

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.353.205

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Online since:

May 2014

Authors:

Nilgun Baydogan*, B. Erkan, A.B. Tugrul, H. Çimenoğlu

Keywords:

Coating, Optical Property, Radiation Damage

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References

[1] Baydogan N.D., Ozkan E. Z., Solar Control on Irradiated Ta2O5 Thin Films, 13th International Conference on Emerging Nuclear Energy Systems, 2007, Istanbul, Turkey.

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DOI: 10.3403/30081955u

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