In order to maximize the light extraction, the photonic crystal structure of p-GaN in 475nm InGaN/GaN light-emitting diode (LED) is theoretically investigated using a finite difference time domain simulation. It is found that the light intensity is co...
In order to maximize the light extraction, the photonic crystal structure of p-GaN in 475nm InGaN/GaN light-emitting diode (LED) is theoretically investigated using a finite difference time domain simulation. It is found that the light intensity is correlated with the photonic band gap (PßG) position relative to a frequency of a/λ and the depth (d)of the hole. The proper depth can be determined with its allowed tolerance. The intensity was maximized when the PßG is properly matched to a/λ= 0.66 (i.e, a? 313.5nm) with a hole depth of d? 105 nm, indicating a significant improvement compared to the conventional LED without photonic crystals.