Nitride‐based light emitting diodes with quaternary p‐AlInGaN surface layers

Abstract

We have demonstrated bulk p-AlInGaN layers and light emitting diodes (LEDs) with p-AlInGaN surface layers by metalorganic chemical vapor deposition (MOCVD). It was found that surface of the LED with p-AlInGaN layer was rough with a high density of hexagonal pits. Although the forward voltage of the LED with p-AlInGaN layer was slightly larger, it was found that we can enhance the output power by 54% by using p-AlInGaN surface layer.