A Systematic Study on Zinc Oxide Materials Containing Group I Metals (Li, Na, K)-Synthesis from Organometallic Precursors, Characterization, and Properties

Polarz S., Orlov A., Hoffmann A., Wagner M. R., Rauch C., Kirste R., ...More

CHEMISTRY OF MATERIALS, vol.21, no.16, pp.3889-3897, 2009 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 21 Issue: 16
  • Publication Date: 2009
  • Doi Number: 10.1021/cm9014223
  • Journal Name: CHEMISTRY OF MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3889-3897
  • Akdeniz University Affiliated: No

Abstract

The reproducible preparation of p-type ZnO represents an important task that might be realized via the partial substitution of Zn2+ by Li+ in the ZnO lattice. Consequently, it is necessary to understand the effect of Li incorporation into ZnO in detail. A systematic approach employing molecular organometallic precursors for the preparation of ZnO materials containing different amounts of Li is presented. The materials have been characterized with various analytical techniques including X-ray absorption, micro-Raman, and low-temperature photoluminescence spectroscopy: high-resolution transmission electron microscopy; powder X-ray diffraction, and electron paramagnetic resonance. It could be seen that Li incorporation is successful only below 12% Li. Already at similar to 1% Li, a maximum in lattice substitution seems to be reached. At higher Li contents, more and more interstitial sites become occupied.

The reproducible preparation of p-type ZnO represents an important task that might be realized via the partial substitution of Zn2+ by Li+ in the ZnO lattice. Consequently, it is necessary to understand the effect of Li incorporation into ZnO in detail. A systematic approach employing molecular organometallic precursors for the preparation of ZnO materials containing different amounts of Li is presented. The materials have been characterized with various analytical techniques including X-ray absorption, micro-Raman, and low-temperature photoluminescence spectroscopy: high-resolution transmission electron microscopy; powder X-ray diffraction, and electron paramagnetic resonance. It could be seen that Li incorporation is successful only below 12% Li. Already at similar to 1% Li, a maximum in lattice substitution seems to be reached. At higher Li contents, more and more interstitial sites become occupied.