外文题目: Synthesis and luminescent behavior of Dy:Y3Ga5O12 phosphor for UV induced white LEDs
作者: Di, J. Q.; Sai, Q. L.; Sun, X. H.; Guo, X. Y.; Zhu, L.
刊名: Optik
年: 2017 卷: 144 页： 86--90
英文关键词:
Dy:Y3Ga5O12; White LEDs; Sol-gel; Phosphors
OPTICAL-PROPERTIES; PHOTOLUMINESCENCE PROPERTIES; ENERGY-TRANSFER; DY3+; NANOPHOSPHORS; EMISSION; GLASSES
英文摘要:
The synthesis, X-ray diffraction (XRD) pattern, excitation spectrum, emission spectra and decay times were studied for the first time to our best knowledge. The Dy:Y3Ga5O12 (Dy:YGG) phosphors with Dy3+ ions concentration of 0.5%, 1%,3%, 5% and 10% were prepared by sol-gel method. The XRD patterns show that the phosphors possess perfect YGG phase. The average particle size of the Dy:YGG phosphors was calculated to be about 40 nm. The strongest excitation peak was 353 nm, which is favorable to ultra violet (UV) induced white light-emitting diodes (LEDs). Three emission bands centered at 480 nm, 580 nm and 672 nm could be observed under excitation of 353 nm. The yellow-to-blue integrated intensity ratios (Y/B) were 1.4-1.7 for the Dy3+ ions concentrations from 0.5 to 5%. The optimum Dy3+ concentration is 3%, and the corresponding 1931 Commission International de I'Eclairage (CIE) coordinates is (x=0.37, y = 0.38). The results show that Dy:YGG phosphors can be a good candidate for UV-excitation warm-yellowish-white LEDs. (C) 2017 Published by Elsevier GmbH.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1016/j.ijleo.2017.06.085


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