کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1612282 | 1516306 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrothermal synthesis and white light emission of cubic ZrO2:Eu3+ nanocrystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
Production of white light has been a promising area of luminescence studies. In this work, white light emitting nanocrystals of cubic zirconia doped with Eu3+ are synthesized by hydrothermal technique. The dopant Eu3+ is used to stabilize crystalline phase to cubic and at the same time to get red counterpart of the white light. The synthesis procedure is simple and precursor required no further annealing for crystallization. X-ray diffraction patterns show the crystalline phase of ZrO2:Eu3+ to be cubic and it is confirmed by Fourier Transform Infrared spectroscopy. From transmission electron microscopy images, size of the crystals is found to be â¼5Â nm. Photoluminescence emission spectrum of the sample, on monitoring excitation at O2â-Eu3+ charge transfer state shows broad peak due to O2â of the zirconia and that of Eu3+ emission. Commission Internationale de l'éclairage co-ordinate of this nanocrystal (0.32, 0.34) is closed to that of the ideal white light (0.33, 0.33). Correlated color temperature of the white light (5894Â K) is within the range of vertical daylight. Lifetime (1.32Â ms) corresponding to 5D0 energy level of the Eu3+ is found to be far longer than conventional red counterparts of white light emitters. It suggests that the ZrO2:Eu3+ nanocrystals synthesized by hydrothermal technique may find applications in simulating the vertical daylight of the Sun.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 587, 25 February 2014, Pages 143-147
Journal: Journal of Alloys and Compounds - Volume 587, 25 February 2014, Pages 143-147
نویسندگان
Sanoujam Dhiren Meetei, Shougaijam Dorendrajit Singh,