Porous semiconductor light emitting device
First Claim
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1. A semiconductor light emitting device comprising:
- a first of one of Si and SiC semiconductor layer of a first conductivity type, said first semiconductor layer including a porous surface region formed of a quantum wire cluster having a transition energy different from the bulk state; and
a second layer formed on said porous region and having a function of supplying carriers of a second conductivity type, said porous region and said second layer forming a diode structure.
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Abstract
An Si or SiC semiconductor layer is subjected to anodic oxidization in an HF solution to form a porous semiconductor layer. Without drying the porous semiconductor layer, it is then dipped in pure water. Ultrasonic waves applied to the pure water shorten the reaction time and help bubbles separate from the surface of the porous region. The porous semiconductor layer is used for forming a pn junction, and carriers are injected into the pn junction.
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Citations
26 Claims
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1. A semiconductor light emitting device comprising:
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a first of one of Si and SiC semiconductor layer of a first conductivity type, said first semiconductor layer including a porous surface region formed of a quantum wire cluster having a transition energy different from the bulk state; and a second layer formed on said porous region and having a function of supplying carriers of a second conductivity type, said porous region and said second layer forming a diode structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An Si light emitting device comprising:
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a laminated SOI substrate structure comprising an Si layer, an insulating layer, and a support substrate, said support substrate and said insulating layer being formed with an opening at an area corresponding to a predetermined area of said Si layer; a porous Si region formed in said Si layer at said predetermined area; an n-type region formed in said Si layer at an area adjacent to said predetermined area of the Si layer; and a p-type region formed in said Si layer at an area adjacent to said predetermined area of the Si layer and facing said n-type region. - View Dependent Claims (19, 20)
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21. A semiconductor light emitting device comprising:
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a light emission layer including a cluster of SiC quantum wires having diameters of 10 nm or less; and a source of electrical excitation connected to said light emission layer. - View Dependent Claims (22, 23, 24)
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25. A semiconductor light emitting device comprising:
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one of an Si and SiC porous semiconductor layer; and an electron field emitter disposed in facing relationship to said porous semiconductor layer. - View Dependent Claims (26)
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Specification