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ZnO/Al2O3 core-shell nanorod arrays: Growth, structural characterization, and luminescent property

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5 Author(s)
Chen, C.Y. ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Lin, C.A. ; Chen, M.J. ; Lin, G.R.
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We reported the aqueous chemical method to fabricate the well-aligned ZnO/Al2O3 nanocrystal (NC) core-shell nanorod arrays (NRAs). Structural characterization showed that the shell layers are composed of ¿-Al2O3 nanocrystals. Photoluminescence measurements showed the enhancement of near-band-edge (NBE) emission of ZnO NRAs due to the presence of Al2O3 NC shells. The Al2O3 NC shell layer resulting in flatband effect near ZnO surface leads to a stronger overlap of the wavefunctions of electrons and holes in the ZnO core, further enhancing the NBE emission. This approach should be very useful in designing many other core-shell NRAs for creating varieties of high-efficiency optoelectronic devices.

Published in:

Nanoelectronics Conference (INEC), 2010 3rd International

Date of Conference:

3-8 Jan. 2010