Patent ID: 7692181
Filing Date: 2010-04-06
Classification: B82Y,H01L

Abstract:
1. A light-emitting layer structure of a GaN-based LED, wherein said LED comprises a sapphire substrate and comprises, on one side of said substrate from bottom to top, a n-type GaN contact layer, a light-emitting layer covering a part of an upper surface of said n-type GaN contact layer, a p-type GaN contact layer covering said light-emitting layer, a positive electrode covering said p-type GaN contact layer, and a negative electrode covering another part of said upper surface of said n-type GaN contact layer not covered by said light-emitting layer, wherein said light-emitting layer, sequentially from bottom to top, comprises: a lower barrier layer, wherein said lower barrier layer is a super lattice barrier layer comprising at least a first ultra-thin monolayer made of AlN and at least a second ultra-thin monolayer made of GaN, sequentially stacked and interleaved with each other; a plurality of intermediate layers with an intermediate barrier layer interposed between every two immediately adjacent intermediate layers, each intermediate barrier layer being a super lattice barrier layer comprising at least a third ultra-thin monolayer made of In-doped AlN and at least a fourth ultra-thin monolayer made of In-doped GaN sequentially stacked and interleaved with each other; and an upper barrier layer, wherein said upper barrier layer is a super lattice barrier layer comprising at least a fifth ultra-thin monolayer made of AlN and at least a sixth ultra-thin monolayer made of GaN, sequentially stacked and interleaved with each other.