Visible luminescence from ZnO nanostructures

An Jen Cheng, Dake Wang, Hee Won Seo, Minseo Park, Yon-Hua Tzeng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationZinc Oxide and Related Materials
Pages277-282
Number of pages6
Publication statusPublished - 2007 Jun 29
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: 2006 Nov 272006 Dec 1

Publication series

NameMaterials Research Society Symposium Proceedings
Volume957
ISSN (Print)0272-9172

Other

Other2006 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period06-11-2706-12-01

Fingerprint

Zinc Oxide
Zinc oxide
zinc oxides
Luminescence
Nanostructures
luminescence
Oxygen
oxygen
wafers
gas flow
Flow of gases
Chemical vapor deposition
Photoluminescence
chambers
adjusting
vapor deposition
broadband
photoluminescence
room temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Cheng, A. J., Wang, D., Seo, H. W., Park, M., & Tzeng, Y-H. (2007). Visible luminescence from ZnO nanostructures. In Zinc Oxide and Related Materials (pp. 277-282). (Materials Research Society Symposium Proceedings; Vol. 957).
Cheng, An Jen ; Wang, Dake ; Seo, Hee Won ; Park, Minseo ; Tzeng, Yon-Hua. / Visible luminescence from ZnO nanostructures. Zinc Oxide and Related Materials. 2007. pp. 277-282 (Materials Research Society Symposium Proceedings).
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Cheng, AJ, Wang, D, Seo, HW, Park, M & Tzeng, Y-H 2007, Visible luminescence from ZnO nanostructures. in Zinc Oxide and Related Materials. Materials Research Society Symposium Proceedings, vol. 957, pp. 277-282, 2006 MRS Fall Meeting, Boston, MA, United States, 06-11-27.

Visible luminescence from ZnO nanostructures. / Cheng, An Jen; Wang, Dake; Seo, Hee Won; Park, Minseo; Tzeng, Yon-Hua.

Zinc Oxide and Related Materials. 2007. p. 277-282 (Materials Research Society Symposium Proceedings; Vol. 957).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - 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.

AB - 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.

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Cheng AJ, Wang D, Seo HW, Park M, Tzeng Y-H. Visible luminescence from ZnO nanostructures. In Zinc Oxide and Related Materials. 2007. p. 277-282. (Materials Research Society Symposium Proceedings).