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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.
