Fig. 5

a I-V and L-I curves for the conventional InGaN/GaN LED and InGaN/GaN LED with compact PS NS array window layers of 100-, 200-, and 500-nm-diameter PS NSs. b L-I curves for the conventional InGaN/GaN LEDs and InGaN/GaN LEDs with periodic, disorder, and multilayer PS array window layers. c L-I curves for the conventional InGaN/GaN LEDs and InGaN/GaN LEDs with compact and optimal periodic PS NS array window layers. The inset of (c) shows the schematic structures of InGaN/GaN LEDs with compact and periodic PS array. The SEM image of the periodic PS array the also represents in the inset of Fig. 5