Current induced light emission from nanocrystalline silicon structures

The photoluminescence and electroluminescence of light emitting porous silicon (LEPOS) are described. The porous silicon is made by anodic dissolution of silicon in HF with an applied electrical current and illumination with visible light. Photoluminescence is observed using ultraviolet light, and visible electroluminescence is achieved by applying a voltage to a solid-state contact on top of the porous layer. The luminescence, the structure, and the composition of LEPOS are studied.<
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