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Materials 2017, 10(7), 779; doi:10.3390/ma10070779

Structure and Photoluminescence Properties of Sm3+ Ion-Doped YInGe2O7 Phosphor

Department of Mechanical and Computer-Aided Engineering, National Formosa University, Huwei, Yunlin 632, Taiwan
Department of Electronic Engineering, National Formosa University, Huwei, Yunlin 632, Taiwan
Author to whom correspondence should be addressed.
Received: 23 May 2017 / Revised: 30 June 2017 / Accepted: 4 July 2017 / Published: 10 July 2017
(This article belongs to the Special Issue Selected Papers from IEEE ICASI 2017)
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A new phosphor, Sm3+ ion-doped YInGe2O7, was synthesized using a planetary ball mill solid state reaction. The XRD patterns show that all of the peaks can be attributed to the monoclinic YInGe2O7 crystal structure when the Sm3+ ion concentration is increased up to 20 mol %. Under an excitation wavelength of 404 nm, the Sm3+ intra-4f transition appears in the emission spectrum including two stronger emission peaks located at 560–570 nm and 598 nm correspond to the 4G5/26H5/2 and 4G5/26H7/2 transitions, respectively, and another weak emission peak located at 645 nm is due to the 4G5/26H9/2 transition. The decay time decreases from 4.5 to 0.8 ms as Sm3+ ion concentrations increase from 1 to 20 mol %, and the decay mechanism of the 4G5/26H7/2 transition is a single decay component between Sm3+ ions only. The concentration quenching effect occurs when the Sm3+ ion concentration is higher than 3 mol %. The CIE color coordinate of Y0.97Sm0.03InGe2O7 phosphor is at x = 0.457 and y = 0.407, which is located in the orange-yellow light region. View Full-Text
Keywords: phosphor; samarium; optical properties; luminescence phosphor; samarium; optical properties; luminescence

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shih, H.-R.; Chang, Y.-S. Structure and Photoluminescence Properties of Sm3+ Ion-Doped YInGe2O7 Phosphor. Materials 2017, 10, 779.

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