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题目：The yellow-to-blue intensity ratio (Y/B) of Dy3+ emission 作者：Su Q iang, Pei Zhiwu, Chi Lisheng, et al. 发表的期刊： Journal of Alloys and Compounds Volume 192, Issues 1-2, 23 February 1993, Pages 25-27 |
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2楼2010-10-03 09:24:26
hblgczy
至尊木虫 (文坛精英)
- 博学EPI: 667
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The yellow-to-blue intensity ratio (Y/B) of Dy3+ emission This article is not included in your organization's subscription. However, you may be able to access this article under your organization's agreement with Elsevier. Qiang Sua, Zhiwu Peia, Lisheng Chia, Hongjie Zhanga, Zhongyi Zhanga and Feng Zoua aChangchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022 China Available online 17 April 2003. Abstract Various borates, vanadates, niobates, antimonates, titanates, zirconates and CaS doped with Dy3+ were prepared. Factors which have an effect on the yellow-to-blue intensity ratio (Y/B) of Dy3+ emission are reported. Y/B increases with decreasing Z/r or electronegativity of the next-neighbour element M in the complex oxides Dy-O-M. The greater the degree of covalency between Dy3+ and O2−, the greater Y/B is. When Dy3+ is located at a site with an inverse centre and high symmetry, Dy3+ displays no luminescence. It seems that Y/B of Dy3+ located at a site deviated from an inverse centre is greater than that of Dy3+ located at a site without an inverse centre. Y/B does not vary much with the variation in concentration of Dy3+ when Dy3+ is substituted for an element with the same valency, but it does depend on the concentration of Dy3+ when Dy3+ is substituted for an element with a different valency in the matrix, because defects are formed in this case. -------------------------------------------------------------------------------- Journal of Alloys and Compounds Volume 192, Issues 1-2, 23 February 1993, Pages 25-27 |
3楼2010-10-03 09:24:59