| 摘要 |
Provided is a nitride semiconductor light emitting element having an improved carrier injection efficiency from a p-type nitride semiconductor layer to an active layer by simple means from a viewpoint utterly different from the prior art. In the nitride semiconductor light emitting element, a buffer layer 2, an undoped GaN layer 3, an n-type GaN contact layer 4, an InGaN/GaN superlattice layer 5, an active layer 6, an undoped GaN-based layer 7, and a p-type GaN-based contact layer 8 are stacked on a sapphire substrate 1. A p-electrode 9 is formed on the p-type GaN-based contact layer 8. An n-electrode 10 is formed on a surface where the n-type GaN contact layer 4 is exposed as a result of mesa-etching. An intermediate semiconductor layer is formed between a well layer closest to a p-side in the active layer having a quantum well structure and the p-type GaN-based contact layer 8. The carrier injection efficiency into the active layer 6 can be improved by making the total film thickness of the intermediate semiconductor layer 20 nm or less.
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