Surface spherical crown arrays structure increases GaN-based LED efficiency |
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| Authors: | Xiaomin Wang Kang Li Fanmin Kong Zhenming Zhang |
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| Institution: | 1. School of Information Science and Engineering, Shandong University, Jinan, 250100, Shandong, China
2. Biomedical Engineering Department, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250100, Shandong, China
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| Abstract: | To increase the light extraction efficiency of GaN-based light-emitting diode (LED) with nano-spherical hexagonal arrays, the finite-difference time-domain method was used to optimize the structure parameters such as radius and height of GaN, $\text{ SiO}_{2}$ and ZnO spherical crown. The light extraction efficiency (LEE) of the GaN spherical crown hexagonal arrays with a radius of 473 nm and a height of 250 nm over the LED surface exhibited 5.7 times the enhancement compared with that of the planar LED, and better than the LEE of the same type of structures with other parameters. |
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