Abstract

Recent results concerning selected optical and mainly transport properties of light-emitting silicon are critically reviewed. A short discussion is devoted to the question of the nature of the optical gap in porous silicon (direct/indirect). Special attention is given to the transport mechanism in strongly luminescent nanoporous silicon. It is concluded that the existence of tail states is crucial for the transport and a three-layer model of silicon nanoparticles is presented. Prospects for electroluminescent devices based on light-emitting silicon are evaluated from the point of view of their efficiency and stability.

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