Patent ID: 8934513
Filing Date: 2015-01-13
Classification: H01L,H01S

Abstract:
1. A semiconductor light emitting device of double hetero junction comprising: an active layer; and clad layers comprising an n-type layer and a p-type layer, said clad layers sandwiching said active layer, a band gap energy of said n-type layer and a band gap energy of said p-type layer being larger than a band gap energy of said active layer; wherein said band gap energy of said n-type layer is smaller than that of said p-type layer, wherein said n-type layer comprises an n-type Al wherein an amount of a difference between said band gap energy of said n-type layer and said band gap energy of said active layer is as low as one third of a difference between said band gap energy of said p-type layer and said band gap energy of said active layer.