Visible luminescence from ZnO nanostructures

An Jen Cheng, Dake Wang, Hee Won Seo, Minseo Park, Yonhua Tzeng

研究成果: Conference contribution

2 引文 斯高帕斯(Scopus)

摘要

Room temperature photoluminescence (PL) spectra from zinc oxide (ZnO) nanostructures were studied. ZnO samples were produced via thermal chemical vapor deposition (thermal-CVD) and a variety of ZnO nanostructures were synthesized by adjusting the oxygen content during the growth process. All samples exhibit a sharp and strong ultra-violet near-band-edge (NBE) emission at about 3.18 eV. The visible emission from the samples deposited under an oxygen-deficient condition were dominated by bluegreen band emission at 2.34 eV. The intensity of the blue-green band was greatly reduced (so-called green band free) for the ZnO deposited at the center of the wafer while strong violet-blue emission bands and broad bands at yellow-orange-red range were collected from the ZnO grown along the edge of the wafer. We believe that the spatial inhomogeniety was caused by turbulent gas flow in the reaction chamber, which resulted in different local oxygen concentration. Origin of visible luminescence from ZnO nanostructures will be discussed and a model to explain the observed visible luminescence process will be presented.

原文English
主出版物標題Zinc Oxide and Related Materials
頁面277-282
頁數6
出版狀態Published - 2007
事件2006 MRS Fall Meeting - Boston, MA, United States
持續時間: 2006 十一月 272006 十二月 1

出版系列

名字Materials Research Society Symposium Proceedings
957
ISSN(列印)0272-9172

Other

Other2006 MRS Fall Meeting
國家/地區United States
城市Boston, MA
期間06-11-2706-12-01

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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