Field emission properties of indium-doped ZnO tetrapods

Indium-doped ZnO (ZnO:In) tetrapods (TPs) with considerably high In content (In < 15 at.%) have been successfully synthesized by a mixed-source vapor phase transportation method (VPT). Powder X-ray diffraction (XRD) measurement of ZnO:In TPs revealed a single hexagonal phase, that indicates high...

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Bibliographic Details
Published in:Current applied physics 2009, 9(2), , pp.169-172
Main Authors: Jung, M.N., Ha, S.H., Oh, S.J., Koo, J.E., Cho, Y.R., Lee, H.C., Lee, S.T., Jeon, T.-I., Makino, H., Chang, J.H.
Format: Article
Language:English
Subjects:
Doping
Field emission
Nanostructure
Tetrapods
ZnO
물리학
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Summary:Indium-doped ZnO (ZnO:In) tetrapods (TPs) with considerably high In content (In < 15 at.%) have been successfully synthesized by a mixed-source vapor phase transportation method (VPT). Powder X-ray diffraction (XRD) measurement of ZnO:In TPs revealed a single hexagonal phase, that indicates high structural quality of ZnO:In TPs. From room-temperature photoluminescence (PL) spectra, the Burstein–Moss (BM) shift was observed, which shows an increase of extrinsic carrier concentration. Also, we could observe field emission from ZnO:In TPs (8 at.%) with a threshold voltage ( Eth) of 5.36 V/μm at a current density of 0.1 μA/cm 2. These results show the feasibility of impurity doping for tailoring the physical properties of ZnO-based nanostructures.
ISSN:1567-1739
1878-1675
DOI:10.1016/j.cap.2008.12.052