Nitride-based light-emitting diodes (LEDs) with an n(superscript -)-GaN layer were proposed and fabricated. By providing a larger series resistance in the vertical direction, it was found that the n(superscript -)-GaN layer could enhance LED output intensity due to the enhanced current spreading. It was also found that LEDs with an n(superscript -)-GaN layer thickness of 0.15, 0.2 and 0.25 μm could endure electrostatic discharge (ESD) surges up to -1200, -1800 and -3000 V, respectively.