The realization of practical, Si-based light-emitting devices would have a significant impact on numerous key technologies such as optoelectronic integrated circuits, optical interconnects, optical memories and logic, and advanced display systems. Previously, Si has exhibited extremely weak emission owing to its indirect bandgap. Recently, however, observations of efficient room-temperature, visible photoluminescence (PL) from porous silicon, have stimulated research and extensive debate on the physical mechanisms responsible for this luminescence. To ...
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