Title :
Light extraction enhancement analysis of GaN-based LED with surface spherical crown array
Author :
Wang, Xiaomin ; Li, Kang ; Kong, Fanmin ; Zhang, Zhenming
Author_Institution :
Shandong Univ., Jinan, China
Abstract :
For promoting the light extraction efficiency (LEE) of GaN-LED with nano-spherical hexagonal arrays, finite-difference time-domain (FDTD) method was used for optimizing the structure parameters such as spherical radius and height. The LEE of GaN spherical crown hexagonal array with 473nm radius and 250nm height over the LED surface exhibited 5.7 times enhancement than that of the planar LED, better than the LEE of whole-sphere array and pure-hemisphere array both.
Keywords :
III-V semiconductors; finite difference time-domain analysis; gallium compounds; light emitting diodes; wide band gap semiconductors; GaN-based LED; finite-difference time-domain method; light extraction efficiency; light extraction enhancement analysis; nanospherical hexagonal arrays; pure-hemisphere array; surface spherical crown array; whole-sphere array; Arrays; Gallium nitride; Lenses; Light emitting diodes; Microoptics; Rough surfaces; Surface roughness;
Conference_Titel :
Numerical Simulation of Optoelectronic Devices (NUSOD), 2012 12th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4673-1602-6
DOI :
10.1109/NUSOD.2012.6316492
