Abstract
Surface coating effect on field emission performance of ZnO nanowires was studied by zinc surface coating. Coating time was found to play an important role in determining the field emission properties. 3 s and 5 s coating enhanced the field emission properties considerably, with lower turn-on field and larger electron emission current density. Prolonging the coating time to 10 s deteriorated the field emission properties of ZnO nanowires. Surface morphology change and green emission in photoluminescence related surface state were found to be responsible for such improvement. Our results provide an innovative approach to improve the field emission properties of ZnO nanowires for development of vacuum nanoelectronic devices.
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Acknowledgements
This project is financially supported by the National Natural Science Foundation of China (NSFC 50902004 and 11023003) and National 973 projects (Nos. 2007CB936202, 2009CB623703, MOST) from China’s Ministry of Science and Technology and the Research Fund for the Doctoral Program of Higher Education. We acknowledge the International Science & Technology Cooperation Program of China Sino Swiss Science and Technology Cooperation Program (2010DFA01810).
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Zhao, Q., Zhu, R., Wang, S. et al. Surface coating effect on field emission performance of ZnO nanowires. Appl. Phys. A 106, 557–562 (2012). https://doi.org/10.1007/s00339-011-6664-x
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DOI: https://doi.org/10.1007/s00339-011-6664-x