Physics – Condensed Matter – Materials Science
Scientific paper
2004-09-08
Physics
Condensed Matter
Materials Science
Replaced due to old version incorrectly placed on the ArXiv
Scientific paper
The diffusion length of minority carriers L p,n is an important characterisation parameter in semiconductor materials and is of particular interest when constructing devices such as solar cells (Hovel 1975), double hetero junction lasers (Casey and Panish 1978) and bipolar transistors. Their efficiency depends primarily on the ability of minority carriers to diffuse through neutral material to a p-n junction or Schottky barrier where they recombine with majority carriers. For this reason diffusion lengths have been measured in a variety of semiconductor materials. The GaAs material was grown by liquid phase epitaxy (LPE) at the Australian Nuclear Science and Technology Organisation. The diffusion lengths measured for high purity ptype and n-type LPE-GaAs samples were observed to be longer than any previously reported. Measurements of minority carrier diffusion lengths for p-type and n-type GaAs were carried out using an electron beam induced current (EBIC) technique.
Alexiev D.
Mo Liping
Prokopovich D. A.
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