کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
846174 | 909172 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Light-extraction enhancement and directional emission control of GaN-based LED with transmission grating
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We theoretically analyze the improvement in light extraction efficiency (LEE) of GaN-based LEDs with transmission grating. Light propagation and extraction was simulated using the finite-difference time-domain (FDTD) method for conical, cylindrical, and hemispherical grating. The simulations show that the use of transmission grating leads to increase in the LEE of GaN-based LEDs. The enhancement in LEE is attributed to the decrease in the Fresnel reflection and the effective increase in the photon escape cone. The maximum LEE enhancement of 2.3 times was achieved by employing hemispherical grating. The directional emission pattern converged by employing conical grating.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - International Journal for Light and Electron Optics - Volume 125, Issue 14, July 2014, Pages 3623–3627
Journal: Optik - International Journal for Light and Electron Optics - Volume 125, Issue 14, July 2014, Pages 3623–3627
نویسندگان
Suihu Dang, Chunxia Li, Tianbao Li, Wei Jia, Peide Han, Bingshe Xu,