Co-doping with antimony to control phosphorous diffusion in germanium
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Computational Physics and Materials Science (CPMS)
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AbstractIn germanium, phosphorous and antimony diffuse quickly and as such their transport must be controlled in order to design efficient n-typed doped regions. Here, density functional theory based calculations are used to predict the influence of double donor co-doping on the migration activation energies of vacancy-mediated diffusion processes. The migration energy barriers for phosphorous and antimony were found to be increased significantly when larger clusters involving two donor atoms and a vacancy were formed. These clusters are energetically stable and can lead to the formation of even larger clusters involving a number of donor atoms around a vacancy, thereby affecting the properties of devices.
CitationTahini HA, Chroneos A, Grimes RW, Schwingenschlögl U (2013) Co-doping with antimony to control phosphorous diffusion in germanium. Journal of Applied Physics 113: 073704. doi:10.1063/1.4792480.
JournalJournal of Applied Physics