Journal
APPLIED PHYSICS EXPRESS
Volume 12, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/1882-0786/ab14cb
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- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan through its Program for research and development of next-generation semiconductor to realize energy-saving society
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Magnesium (Mg) ion implanted homoepitaxial GaN layers is investigated by cathodoluminescence (CL) and secondary ion mass spectrometry (SIMS). The impact of dislocations on Mg diffusion is clarified by CL monitoring the Mg-related donor-acceptor pair (DAP) emission on novel angle cutting specimen. CL results suggest that: (1) there exist high concentration of nonradiative defects in a Mg implanted layer; and (2) Mg shows pipe diffusion along threading dislocations throughout epilayer to substrate. To achieve successful Mg doping by ion implantation, it is necessary to suppress the formation of a dead region in the Mg implanted layer and the pipe diffusion along threading dislocations. (c) 2019 The Japan Society of Applied Physics
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