Carrier diffusion processes near threading dislocations in GaN and GaN:Si characterized by low voltage cathodoluminescence

Publisher:
Elsevier
Publication Type:
Journal Article
Citation:
Superlattices and Microstructures, 2006, 40 (4-6), pp. 557 - 561
Issue Date:
2006-01
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We present a low temperature study of GaN eiplayers by means of low voltage cathodoluminescence (CL). We show that lowering the primary electrons accelerating voltage down to 1 kV allows imaging of single threading dislocations. By using monochromatic or panchromatic low voltage CL microscopy, it is possible to extract different diffusion lengths related to free excitons, bound excitons or donot-to-acceptor pair transitions.
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