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      YAGG:Ce transparent ceramics with high luminous efficiency for solid-state lighting application

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          Abstract

          A series of Y 2.985Al 5–xGa xO 12:0.015Ce (YAGG:Ce, x = 0, 1, 2, 3, 4, 5) transparent ceramics were prepared via a solid-state reaction method. Two-step sintering technique was proved to be an effective approach to prepare functional ceramics with high Ga concentration, and Y 3Ga 5O 12 (YGG) transparent ceramic was successfully prepared for the first time. According to the variation of Al/Ga ratio, regulation of band structure and luminescence properties of YAGG:Ce transparent ceramics were effectively investigated. When Ga substitutes Al sites, the tetrahedral site is more favorable compared to the octahedral site for Ga to occupy according to the first-principle calculation. A continuous blue shift of the emission from 565 to 515 nm was achieved as Ga was gradually introduced into Y 3Al 5O 12:Ce matrix. High quality green light was obtained by coupling the YAGG:Ce ceramics with commercial blue InGaN chips. Transparent luminescence ceramics accomplished in this work can be quite prospective for high power LED application.

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          Author and article information

          Journal
          J Adv Ceram
          Journal of Advanced Ceramics
          Tsinghua University Press and Springer-Verlag Berlin Heidelberg (USA )
          2227-8508
          2226-4108
          01 September 2019
          01 October 2019
          : 8
          : 3
          : 389-398
          Affiliations
          aSchool of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
          bNingbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
          cSchool of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
          Author notes
          *Corresponding authors: H. Qin, qinhaiming@ 123456nimte.ac.cn ; Z. Zhang, zhangzhijun@ 123456shu.edu.cn ; J. Jiang, jjun@ 123456nimte.ac.cn

          † These authors contributed equally to this work.

          Article
          s40145-019-0321-9
          10.1007/s40145-019-0321-9
          Copyright © The Author(s)

          This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See https://creativecommons.org/licenses/by/4.0/.

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