公开(公告)号：US20140151738A1

公开(公告)日：2014-06-05

申请号：US14173662

申请日：2014-02-05

Applicant: CREE, INC.

Inventor： STEVEN P. DENBAARS ,  JAMES IBBETSON ,  SHUJI NAKAMURA

IPC: H01L33/22 ,  H01L33/42

CPC classification number: H01L33/22 ,  H01L33/007 ,  H01L33/0079 ,  H01L33/42

Abstract: A light emitting diode (LED) includes a p-type layer of material, an n-type layer of material and an active layer between the p-type layer and the n-type layer. A roughened layer of transparent material is adjacent one of the p-type layer of material and the n-type layer of material. The roughened layer of transparent material has a refractive index close to or substantially the same as the refractive index of the material adjacent the layer of transparent material, and may be a transparent oxide material or a transparent conducting material. An additional layer of conductive material may be between the roughened layer and the n-type or p-type layer.

Abstract translation: 发光二极管（LED）包括p型层材料，n型层材料和p型层与n型层之间的有源层。 透明材料的粗糙层与p型材料层和n型材料层相邻。 透明材料的粗糙层具有接近或基本上等于与透明材料层相邻的材料的折射率的折射率，并且可以是透明氧化物材料或透明导电材料。 附加的导电材料层可以在粗糙层和n型或p型层之间。