Patent ID: 7880186

Claim:
A semiconductor light emitting device comprising: an n-type region; a p-type region; a III-nitride light emitting layer disposed between the n-type region and the p-type region; a first spacer layer disposed between the n-type region and the light emitting layer, the first spacer layer being in direct contact with the light emitting layer, wherein the first spacer layer is doped to a dopant concentration between 6×10 18 cm −3 and 5×10 19 cm −3 ; a second spacer layer disposed between the p-type region and the light emitting layer, the second spacer layer being in direct contact with the light emitting layer, wherein the second spacer layer is not intentionally doped or doped to a dopant concentration less than 6×10 18 cm −3 ; and a blocking layer comprising aluminum, wherein the AlN composition in the blocking layer is greater than 8% and less than 30% and wherein the second spacer is disposed between the light emitting layer and the blocking layer.