Visible photoluminescence in ZnO tetrapod and multipod structures

Aleksandra B. Djurišić*, Yu Hang Leung, Wallace C.H. Choy, Kok Wai CHEAH, Wai Kin Chan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

150 Citations (Scopus)

Abstract

The investigation of the properties of ZnO tetrapod and multipod structures using scanning electron microscopy, X-ray diffraction, photoluminescence (PL) and electron paramagnetic resonance (EPR) spectroscopy was discussed. The ZnO samples were fabricated by heating a mixture of ZnO, GeO2 and graphite at 1100°C in order to modify the morphology of the fabricated structures. The room temperature of PL was measured by using a HeCd laser excitation source (325 nm). It was found that the green PL was due to transition between a shallow donor and deep acceptor in the absence of g ≈ 1.96 EPR signal and transition between the conduction band and deep acceptor in the absence of g ≈ 1.96 EPR signal.

Original languageEnglish
Pages (from-to)2635-2637
Number of pages3
JournalApplied Physics Letters
Volume84
Issue number14
DOIs
Publication statusPublished - 5 Apr 2004

Scopus Subject Areas

  • Physics and Astronomy (miscellaneous)

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