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In the present article we employ positron annihilation lifetime spectroscopy and secondary ion mass spectrometry to study the thermal evolution of vacancy related defects in fluorine-implanted germanium. We find that fluorine enriches the germanium matrix with various vacancy-like clusters that show both concentration and annealing temperature-dependent behaviour. We demonstrate that low fluorine concentrations saturate the Ge matrix with large concentrations of divacancy-like complexes that are effectively removed after moderate annealing. High fluorine concentrations, however, appear to stabilize a large component of monovacancy-like complexes in the near-surface region of the Ge substrates. These monovacancy-like complexes also appear to be thermodynamically stable, even after high-temperature annealing. The nucleation and thermal evolution of these vacancy-like defects may have particular …
IOP Publishing
Publication date: 
27 Nov 2013

DJ Sprouster, Colin Campbell, SJ Buckman, G Impellizzeri, E Napolitani, Simon Ruffell, JP Sullivan

Biblio References: 
Volume: 46 Issue: 50 Pages: 505310
Journal of Physics D: Applied Physics