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Materials 2017, 10(7), 779;

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

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