کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397482 | 1392644 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Strong thermal stability of Lu3Al5O12:Ce3+ single crystal phosphor for laser lighting
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Green-yellow single crystal Lu3Al5O12:Ce3+ (LuAG:Ce) as a color conversion phosphor for high-power laser lighting was grown through a floating zone method by an image furnace. It showed an excellent thermal stability, a lower quantum efficiency (QE), and a broader photoluminescence excitation (PLE) spectrum compared with the polycrystalline powder phosphor. The thermal stability was explained by a decrease of intrinsic defects and a less phonon generation at high temperature, confirmed by PLE spectra and temperature-dependent Raman spectra, respectively. To evaluate its feasibility for high-power laser lighting, the single crystal LuAG:Ce was applied to a 5 W blue laser diode with a remote-phosphor structure, and thus it reached a lower equilibrium temperature at 62 °C after 40 min operating in comparison with the polycrystalline powder phosphor (95 °C). Thus, the single crystal LuAG:Ce phosphor can achieve the extremely stable light emission without an efficiency loss under the high-power density of blue laser diode.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 191, Part A, November 2017, Pages 35-39
Journal: Journal of Luminescence - Volume 191, Part A, November 2017, Pages 35-39
نویسندگان
T.W. Kang, K.W. Park, J.H. Ryu, S.G. Lim, Y.M. Yu, J.S. Kim,