کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7840566 | 1505868 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Color-tunable emission by adjusting sensitizer (Yb3+) and excitation power of 980Â nm in NaGdTiO4:Yb3+/Tm3+/Er3+ phosphors for light emitting diodes
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Color-tunable emission by adjusting sensitizer (Yb3+) and excitation power of 980Â nm in NaGdTiO4:Yb3+/Tm3+/Er3+ phosphors for light emitting diodes Color-tunable emission by adjusting sensitizer (Yb3+) and excitation power of 980Â nm in NaGdTiO4:Yb3+/Tm3+/Er3+ phosphors for light emitting diodes](/preview/png/7840566.png)
چکیده انگلیسی
Color-tunable upconversion emission was explored in the NaGdTiO4 synthesized by a high temperature solid-state reaction process. NaGdTiO4:Er3+, NaGdTiO4:Yb3+/Tm3+ and NaGdTiO4:Yb3+/Er3+ are mainly dominated by green, blue and yellow light emissions under 980Â nm diode laser, respectively. The intensity ratios of red to green luminescence and blue to green luminescence increase with increasing the concentration of Yb3+ in NaGdTiO4:Yb3+/Tm3+/Er3+ phosphors. Changing the power of laser can influence the photon transfer pathways and eventually tune the emission colors. Additionally, the laser excitation heating effect and the temperature dependent spectra were also investigated, which indicated that the laser-induced heating effect was not the main reason for the laser power to change the emission. The CIE chromaticity coordinates of NaGdTiO4:60%Yb3+/1%Tm3+/5%Er3+ are close to the standard white light (x = 0.33, y = 0.33) and the sample has a good thermal stability. The strategies for color tuning of upconversion emission proposed in the NaGdTiO4 would be beneficial to achieve efficient multicolor (including white light) luminescence.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 194, February 2018, Pages 225-230
Journal: Journal of Luminescence - Volume 194, February 2018, Pages 225-230
نویسندگان
Aihua Zhou, Feng Song, Yingdong Han, Feifei Song, Dandan Ju, Khan Adnan, Lisa Liu, Ming Feng,