Abstract
AbstractGaN is the most promising upgrade to the traditional Si-based radiation-hard technologies. However, the underlying mechanisms driving its resistance are unclear, especially for strongly ionising radiation. Here, we use swift heavy ions to show that a strong recrystallisation effect induced by the ions is the key mechanism behind the observed resistance. We use atomistic simulations to examine and predict the damage evolution. These show that the recrystallisation lowers the expected damage levels significantly and has strong implications when studying high fluences for which numerous overlaps occur. Moreover, the simulations reveal structures such as point and extended defects, density gradients and voids with excellent agreement between simulation and experiment. We expect that the developed modelling scheme will contribute to improving the design and test of future radiation-resistant GaN-based devices.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy
Reference44 articles.
1. Pengelly, R. S., Wood, S. M., Milligan, J. W., Sheppard, S. T. & Pribble, W. L. A review of GaN on SiC high electron-mobility power transistors and MMICs. IEEE Trans. Microw. Theory Techn. 60, 1764–1783 (2012).
2. Pearton, S. J., Ren, F., Patrick, E., Law, M. E. & Polyakov, A. Y. Review—ionizing radiation damage effects on GaN devices. ECS J. Solid State Sci. Technol. 5, Q35–Q60 (2016).
3. Richard, Y. et al. In-flight experience and results of the PROBA-V low cost X-Band HDR-TM Transmitter. The 4S Symposium 20141-14 (2014).
4. ESA. European Space Agency—key components of tree-counting biomass radar cleared for space. http://www.esa.int/our_activities/space_engineering_technology/key_components_of_treecounting_biomass_radar_cleared_for_space (2018).
5. Ruterana, P., Lacroix, B. & Lorenz, K. A mechanism for damage formation in GaN during rare earth ion implantation at medium range energy and room temperature. J. Appl. Phys.109, 013506 (2011).
Cited by
27 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献