کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6598313 | 1423878 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electronic structure, photoluminescence and phosphorescence properties in Sr2ScGaO5:Sm3+
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Novel reddish long lasting phosphorescence material Sr2ScGaO5:Sm3+ was designed and prepared by a solid state reaction. The results of morphology showed that the irregular microparticles were formed by the agglomeration of uniform submicron particles with the size of about 0.5-1â¯Î¼m. The electronic structure with an indirect bandgap was evaluated in detail by the density functional theory calculations and the diffuse reflectance spectrum for the first time. By the two different methods, the bandgap energy of Sr2ScGaO5 was determined to be about 4.24 and 4.75â¯eV, respectively. The emission of Sm3+ ion at 604â¯nm is strongest in the photoluminescence process, while in the phosphorescence process the emission at 619â¯nm is dominant. According to the analysis on the optical properties, the interesting phenomenon about the difference between the photoluminescence and phosphorescence was revealed and explained by the fact that the conduction band played an important role in the phosphorescence process. Additionally, the result showed that the material can be stimulated effectively in very short time and would have great potential in the applications such as AC-light emitting diodes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 157, October 2018, Pages 259-266
Journal: Dyes and Pigments - Volume 157, October 2018, Pages 259-266
نویسندگان
Gen Li, Wei Chen, Yuhua Wang, Bernadette Duhan,