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Porous silicon light-emitting P-N junction

: Lang, W.; Steiner, P.; Kozlowski, F.; Sandmaier, H.

E-MRS Meeting 1993. Proceedings
European Materials Research Society (Meeting) <1993, Strasbourg>
Fraunhofer IFT; 2000 dem IZM eingegliedert
luminescence; porous silicon

The fabrication and properties of a light-emitting porous silicon device incorporating a p-n junction are presented. By means of a selective anodization of a sandwich of p+ on n-substrate, a nanoporous recombination region within the p-n junction is formed. The device shows rectifying characteristics with a considerable series resistance. When driven under forward bias, the diode emits bright light with linear dependence on the current. The measured external quantum efficiency is of the order of 10high-2 percent. The internal quantum efficiency should be at least one order of magnitude higher.