Synthesis and photoluminescence study on ZnO nano-particles |
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| Authors: | Li Xiang Zhai Fei-Fei Liu Ying Cao Mao-Sheng Wang Fu-Chi and Zhang Xi-Xiang |
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| Institution: | School of Material Sciences and Engineering, Beijing Institute of Technology, Beijing 100081, China; Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China |
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| Abstract: | A new technique, namely low pressure sputtering, has been developed
to fabricate Zn nanoparticles, with a subsequent oxidation to
synthesize ZnO nanoparticles in the ambient atmosphere at
500$\,^{\circ}$C. The synthesized ZnO nanoparticle has a size of
6--8~nm with a preferred orientation of $c$-axis. The produced ZnO
nanoparticles have a good UV photoluminescence (PL) emission energy
of 3.349 eV with a significant enhancement of donor--acceptor pair
emission located at 3.305 eV which implies a number of donor and
acceptor bounded excitons existing in the synthesized ZnO nano
particles. The near band edge PL emission of the fabricated ZnO is
dominated by the bounded excitons at 10~K. |
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| Keywords: | sputtering ZnO nanoparticle photoluminescence |
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