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High-phase-purity zinc-blende InN on r -plane sapphire substrate with controlled nitridation pretreatment

  • Ching Lien Hsiao*
  • , Ting Wei Liu
  • , Chien Ting Wu
  • , Hsu Cheng Hsu
  • , Geng Ming Hsu
  • , Li Chyong Chen
  • , Wen Yu Shiao
  • , C. C. Yang
  • , Andreas Gällström
  • , Per Olof Holtz
  • , Chia Chun Chen
  • , Kuei Hsien Chen
  • *此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

27   連結會在新分頁中打開 引文 斯高帕斯(Scopus)

摘要

High-phase-purity zinc-blende (zb) InN thin film has been grown by plasma-assisted molecular-beam epitaxy on r -plane sapphire substrate pretreated with nitridation. X-ray diffraction analysis shows that the phase of the InN films changes from wurtzite (w) InN to a mixture of w-InN and zb-InN, to zb-InN with increasing nitridation time. High-resolution transmission electron microscopy reveals an ultrathin crystallized interlayer produced by substrate nitridation, which plays an important role in controlling the InN phase. Photoluminescence emission of zb-InN measured at 20 K shows a peak at a very low energy, 0.636 eV, and an absorption edge at ∼0.62 eV is observed at 2 K, which is the lowest bandgap reported to date among the III-nitride semiconductors.

原文英語
文章編號111914
期刊Applied Physics Letters
92
發行號11
DOIs
出版狀態已發佈 - 2008

ASJC Scopus subject areas

  • 物理與天文學(雜項)

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