2006年12月
Luminescence of color centers formed in alkali-earth-doped yttrium orthoaluminate crystals
JOURNAL OF LUMINESCENCE
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- 巻
- 121
- 号
- 2
- 開始ページ
- 517
- 終了ページ
- 526
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jlumin.2005.12.002
- 出版者・発行元
- ELSEVIER SCIENCE BV
Alkali-earth-doped yttrium orthoaluminate crystals grown in a reducing atmosphere are found to show bright photo luminescence (PL) in visible wavelength regions under the excitation by UV light source. From the results of transmission, PL, PL excitation and time-resolved PL spectra for the samples with different types and concentrations of dopants and the comparison to the results for the samples grown under different conditions, the origin of principal emission is determined to be color centers stabilized by heterovalent ions. The observed fast lifetime and high quantum yield of the luminescence can be explained by dipole-allowed transition between the levels localized in a vacancy. Comparing the effects on the optical properties from several types of dopant ions and taking influence from the UV irradiation into account, a model for the structure of emission centers is proposed. (c) 2006 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.jlumin.2005.12.002
- ISSN : 0022-2313
- Web of Science ID : WOS:000242751200066