کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5488923 | 1399590 | 2017 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Light-extraction enhancement of white LEDs with different phases of TiO2:0.01Eu3+ spheres
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report the synthesis of TiO2:0.01Eu3+ spheres by a solvothermal reaction method and their utilization in the enhancement of light-extraction efficiency. The light-extraction efficiency was enhanced by increasing the extraction probability of the internal and external reflected photons in the YAG:Ce3+ yellow phosphor based white light-emitting diodes (WLEDs). The crystalline structure of TiO2:0.01Eu3+ spheres was investigated by an X-ray diffraction analysis. The anatase phased TiO2:0.01Eu3+ spheres exhibited a typical red emission under 463.5Â nm wavelength. The diffused reflectance spectra displayed higher reflectance for rutile phase and lower for anatase phase. However, compared to the typically, combination of YAG:Ce3+ yellow phosphor and blue LED chip, fabricated WLED, the light-extraction efficiency of WLED was improved to 80% when TiO2: 0.01Eu3+ spheres were mixed with YAG:Ce3+ phosphor in the fabrication process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 17, Issue 4, April 2017, Pages 527-532
Journal: Current Applied Physics - Volume 17, Issue 4, April 2017, Pages 527-532
نویسندگان
Ju Young Mun, Ganji Seeta Rama Raju, Jin Young Park, Hyun Kyoung Yang,