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Defect evolution in ZnO and its effect on radiation tolerance
1College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, P. R. China. hitljp@gmail.com.
Physical Chemistry Chemical Physics : PCCP
|April 18, 2018
Summary
Radiation tolerance of zinc oxide (ZnO) is enhanced by engineering intrinsic defects. Oxygen-deficient defects improve ZnO
Area of Science:
- Materials Science
- Solid State Physics
- Radiation Effects
Background:
- The radiation resistance of zinc oxide (ZnO) is not well understood.
- Intrinsic defects in ZnO are hypothesized to influence its radiation tolerance.
Purpose of the Study:
- To investigate the role of native defects in ZnO's radiation tolerance.
- To explore methods for tuning ZnO's radiation resistance through defect engineering.
Main Methods:
- Nitrogen ion (N+) implantation into ZnO nanocrystals with varying defect concentrations.
- Hydrogen ion (H+) implantation into ZnO.
- Systematic analysis of radiation damage in relation to defect types and concentrations.
Main Results:
- Decreasing oxygen vacancies (VO) and interstitial zinc (Zni) concentrations exacerbated radiation damage from N+ implantation.
- This suggests that oxygen-deficient defects contribute to the radiation hardness of ZnO.
- Similar results were observed for H+ implantation.
Conclusions:
- Intrinsic oxygen-deficient defects are key to the radiation hardness of ZnO.
- Engineering these defects offers a pathway to enhance ZnO's radiation tolerance.
- This research facilitates ZnO applications in radiation-intensive environments.
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