Efficient red-emission InGaN/GaN multilayered structure on Si with surface-nitrified HfO2 film as buffer layer

Wei Zhang, Xuehua Zhang, Yongjin Wang, K. Hane, Fangren Hu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A four-period InGaN/GaN (8 nm/48 nm) layered structure was deposited on a Si substrate with a surface-nitrified HfO2 film as a buffer layer (5 nm). A high In concentration of In0.36Ga0.64N was obtained in the InGaN layers. Red photoluminescence of 648 nm was observed from the layered structure. The internal quantum efficiency of the red emission from the InGaN layers on the surfacenitrified HfO2/Si was 52 %, which was more than 18 times larger than that on the Si substrate without HfO2. The surface-nitrified HfO2 provides another effective buffer layer to grow the InGaN/GaN layered structure on the Si substrate.

Original languageEnglish
Article number188
JournalApplied Physics A: Materials Science and Processing
Volume122
Issue number3
DOIs
Publication statusPublished - 2016 Mar

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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