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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Luminescence Properties of 12CaO?7Al2O3:Dy3+ Ceramics
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 1959-1960)
Author(s): Han-cheng Zhu, Center for Advanced Optoelectronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun, China
Yu-xue Liu, Center for Advanced Optoelectronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun, China
Duan-ting Yan, Center for Advanced Optoelectronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun, China
Meng Zhang, Center for Advanced Optoelectronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun, China
Ying Liu, Center for Advanced Optoelectronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun, China
Ke Liu, Center for Advanced Optoelectronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun, China
Yi-chun Liu, Center for Advanced Optoelectronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun, China
Chang-shan Xu, Center for Advanced Optoelectronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun, China
Abstract: The transparent ceramics of 12CaO·7Al2O3:Dy3+ were prepared by solid-state reaction technology. The samples were investigated by X-ray diffraction, photoluminescence and photoluminescence excitation spectra. Dy3+ activated phosphors have two dominant emission bands in the blue region (~486 nm) and yellow region (~576 nm). The yellow emission of Dy3+ corresponding to 4F9/2→6H13/2 was hypersensitive transition which was influenced strongly by the surroundings. It was possible to obtain near-white light by suitably adjusting the yellow-to-blue intensity ratio (Y/B) value of Dy3+-activated material. Results of spectral analysis indicated that Dy3+ had been doped into the 12CaO·7Al2O3 lattice. The emission spectra indicate that this ceramic could emit white light under UV light excitation.
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