Journal
CRYSTENGCOMM
Volume 15, Issue 5, Pages 977-981Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ce26550h
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Funding
- NSFC [11104240, 60976002]
- 973 Program [2011CB302004]
- MOE [20110092130006]
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ZnO quantum dots with tunable size in the range of 2.0-7.8 nm were synthesized through a facile sol-gel route. Photoluminescence and photoluminescence excitation spectral examinations revealed that two types of transition mechanisms might occur under control during excitation regulation corresponding to the coexistence of deep and shallow levels in energy band structure. The broad-color emission from violet to orange could be tuned by adjusting the excitation energy and quantum dot size. Moreover, ZnO quantum dots with tunable and broad luminescence were demonstrated to be promising in the anti-fake labeling applications.
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