Synthesis and luminescent properties of strong blue light-emitting Al 2O3/ZnO nanocables

Chi Sheng Hsiao*, Wan Lin Kuo, San-Yuan Chen, Ji Lin Shen, Chin Ching Lin, Syh Yuh Cheng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Photoelectronic characteristics are investigated in well-aligned aluminum-coated ZnO nanorods (Al2 O3 /ZnO nanocables) grown on Si substrates buffered with ZnO film at a low temperature. Photoluminescence measurement indicates that a strong blue emission peak at ∼450 nm appears at 400 and 600°C in O2 and N2 atmospheres, respectively. A 30× enhancement of the relative intensity ratio of blue emission (IB) to ultraviolet emission (IUV) has been observed for the Al2 O3 /ZnO nanocables. High-resolution transmission electron microscopy and X-ray photoelectron spectroscopy analyses reveal that the origin of the strong blue emission can be attributed to the structure transition and cleavage of the oxygen-hydrogen bond (OH) of the Al2 O3 /ZnO nanocable, which leads to the formation of singly ionized oxygen vacancies (Al- O).

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume155
Issue number5
DOIs
StatePublished - 14 Apr 2008

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