Surface Morphology and Carbon Incorporation for Hexagonal GaN/(111)B GaAs Metalorganic Vapor Phase Epitaxy Using Dimethylhydrazine and Trimethylgallium

概要

論文の詳細を見る
Using dimethylhydrazine (DMHy) as a group V source, we grew hexagonal GaN layers on (111)B GaAs substrates by low-pressure metalorganic vapor phase epitaxy. The surface morphology of the hexagonal GaN layers and the carbon incorporation in them strongly depend on the V/III ratio and the reactor pressure. A flat GaN surface can be obtained at the V/III ratio of 60 and the substrate temperature of 850℃. The carbon concentration decreases with increasing reactor pressure and the minimum concentration is 2×10^<19> cm^<-3> for hexagonal GaN grown at 300 Torr. Low-temperature photoluminescence measurements reveal that the band edge emission for the GaN grown at 300 Torr is dominant compared with that of a deep level.
社団法人応用物理学会の論文
1997-05-15