Figure 4From: Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light-emitting diodes Shows the CIE 1931 x , y chromaticity space. Showing the chromaticity coordinates of LEDs under forward bias for ZnO NRs/p-GaN LEDs, (a) as-grown ZnO NRs, (b) after irradiation with fluency of approximately 2 × 1013 ions/cm2, (c) after irradiation with fluency of approximately 4 × 1013 ions/cm2, and (d) all together for comparison.Back to article page