Patent ID: 9136434
Filing Date: 2015-09-15
Classification: H01L

Abstract:
1. A light emitting device comprising: an n-type layer; a p-type layer; an active region sandwiched between the n-type layer and the p-type layer; wherein the active-region has a wavy structure with nano or micro fluctuations in its thickness direction; wherein the n-type layer comprises crystal facets on its upper surface, and the active-region is conformally formed on the upper surface of the n-type layer and substantially follows the shape of the crystal facets so as to form the wavy structure; wherein the n-type layer comprises (00.1)-oriented III-nitride pillars and the crystal facets are formed on top of the (00.1)-oriented III-nitride pillars, wherein each of the pillars provides six facets due to six-fold crystal structure symmetry; or the n-type layer comprises (111)-oriented III-nitride pillars and the crystal facets are formed on top of the (111)-oriented III-nitride pillars, wherein each of the pillars provides four facets due to four-fold crystal structure symmetry; and wherein the (00.1)-oriented III-nitride pillars contain a strain-modulation structure which contains a silicon concentration peak of above 5×10