Integrated porous-silicon light-emitting diodes: A fabrication process using graded doping profiles

Barillaro, G.; Diligenti, A.; Pieri, F.; Fuso, F.; Allegrini, M.
June 2001
Applied Physics Letters;6/25/2001, Vol. 78 Issue 26, p4154
Academic Journal
A fabrication process, compatible with an industrial bipolar+complementary metal-oxide-semiconductor (MOS)+diffusion MOS technology, has been developed for the fabrication of efficient porous-silicon-based light-emitting diodes. The electrical contact is fabricated with a double n[sup +]/p doping, achieving a high current injection efficiency and thus lower biasing voltages. The anodization is performed as the last step of the process, thus reducing potential incompatibilities with industrial processes. The fabricated devices show yellow-orange electroluminescence, visible with the naked eye in room lighting. A spectral characterization of light emission is presented and briefly discussed. © 2001 American Institute of Physics.


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