Correlation between photoluminescence and varied growth pressure of well-aligned ZnO nanorods on fused silica substrate

Song Yang, Hsu-Cheng Hsu, Wei Ren Liu, Hsin Min Cheng, Wen Feng Hsieh

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Well-aligned ZnO nanorods with variable diameters were fabricated on fused silica substrates by the simple physical vapor deposition method with and without pre-deposited NiO particles. The diameter control of ZnO nanorods on the fused silica substrates was achieved by varying the growth pressure. The room-temperature photoluminescence spectra of the ZnO nanorods exhibit strong exciton emission at 3.25 eV that reveals good crystal quality. The exciton emission peak shifts toward 3.22 eV for the samples made at the larger growth pressure that is attributed to the influence of the electron-acceptor-level transition. The ZnO nanorods were examined by high resolution transmission electron microscopy and X-ray diffraction to show single crystal quality and preferentially c-axis alignment. Furthermore, we used scanning electron microscope to verify not only the size but also the growth mechanisms of ZnO nanorods. The results show a ZnO buffer layer formed between the flat top-facet nanorods and the substrate. In comparison with the samples without pre-deposited NiO particles on the substrate, the pre-deposited NiO particles act as nucleation centers for Zn vapor during the deposition process that improves the quality of the buffer layer.

Original languageEnglish
Pages (from-to)502-507
Number of pages6
JournalOptical Materials
Volume30
Issue number3
DOIs
Publication statusPublished - 2007 Jan 1

Fingerprint

Fused silica
Nanorods
nanorods
Photoluminescence
silicon dioxide
photoluminescence
Substrates
Buffer layers
Excitons
buffers
excitons
Physical vapor deposition
Electron transitions
High resolution transmission electron microscopy
flat surfaces
Nucleation
Electron microscopes
electron microscopes
Vapors
alignment

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

Cite this

Yang, Song ; Hsu, Hsu-Cheng ; Liu, Wei Ren ; Cheng, Hsin Min ; Hsieh, Wen Feng. / Correlation between photoluminescence and varied growth pressure of well-aligned ZnO nanorods on fused silica substrate. In: Optical Materials. 2007 ; Vol. 30, No. 3. pp. 502-507.
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Correlation between photoluminescence and varied growth pressure of well-aligned ZnO nanorods on fused silica substrate. / Yang, Song; Hsu, Hsu-Cheng; Liu, Wei Ren; Cheng, Hsin Min; Hsieh, Wen Feng.

In: Optical Materials, Vol. 30, No. 3, 01.01.2007, p. 502-507.

Research output: Contribution to journalArticle

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