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A novel structure of AlGaN/GaN heterostructure which has a high temperature AlN interlayer (HT-AlN) in GaN buffer grown by metal organic chemical vapor deposition(MOCVD) on c-plane sapphire substrate has been researched. It is found that both electron mobility and sheet carrier concentration are increased by the HT-AlN interlayer compared to AlGaN/GaN heterostructure without HT-AlN interlayer. The...
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