Patent ID: 9324912
Filing Date: 2016-04-26
CPC Classification: H01L

Claim Text:
1. A group III nitride semiconductor light-emitting element having a pn junction hetero structure, comprising: an n-type aluminum gallium indium nitride layer; a light-emitting layer configured with a gallium indium nitride layer that is arranged in contact with the n-type aluminum gallium indium nitride layer and contains a crystal having a lattice constant larger than that of the n-type aluminum gallium indium nitride layer; and a p-type aluminum gallium indium nitride layer that is provided on the light-emitting layer, wherein an atomic concentration of a donor impurity existing in the n-type aluminum gallium indium nitride layer and composed of an element having an atomic radius smaller than that of indium is lower at an interface between the n-type aluminum gallium indium nitride layer and the light-emitting layer than in an inside of the n-type aluminum gallium indium nitride layer, and an atomic concentration of the donor impurity in the light-emitting layer is higher at an interface between the light-emitting layer and the p-type aluminum gallium indium nitride layer than at the interface between the light-emitting layer and the n-type aluminum gallium indium nitride layer.