期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 762, 期 -, 页码 537-547出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.05.266
关键词
Monodisperse; Optical materials; Coprecipitation & hydrothermal methods; Crystal growth & structure; Morphology; Luminescence
资金
- National Natural Science Foundation of China [51772185, 51171239, 11275249]
- 111 program [D16002]
- Science and Technology Commission of Shanghai Municipality [15DZ2260300]
- Shanghai University Innovation Program
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2015M2B2A4033073, 2016R1D1A1B03933488]
- National Research Foundation of Korea [2015M2B2A4033073, 2016R1D1A1B03933488] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Uniform, monodisperse yttrium aluminum garnet (YAG) rhombic dodecahedron micro-crystals were synthesized using coprecipitation and hydrothermal methods. The Na2SO4 as a surfactant was helpful in improving the dispersity of the crystallites and forming well-faceted, micro-sized dodecahedral YAG crystallites. The effect of the reaction time and the solvent has also been studied. The crystal growth mechanism called dissolution/crystallization was determined by analyzing the experimental and simulated results. And the specific well-developed crystal facets in the {110} family have been demonstrated by the theoretical calculation. A higher integrated emission intensity can be achieved for the YAG:Ce crystallites by improving the phase purity, morphology with better developed dodecahedrons, and dispersion. Furthermore, a rather high luminous efficacy (LE = 104.14 lm/W) for the white LED fabricated using the YAG:Ce3+ phosphor prepared in this work was realized. The correlation between the crystal growth, morphology and luminescence properties of YAG crystallites has been established, which exhibits a great importance for the synthesis and application of mono-dispersed YAG crystallites. (C) 2018 Elsevier B.V. All rights reserved.
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