Active solid-state devices (e.g. – transistors – solid-state diode – Non-single crystal – or recrystallized – semiconductor... – Non-single crystal – or recrystallized – material forms active...
Patent
1998-08-28
2000-12-05
Abraham, Fetsum
Active solid-state devices (e.g., transistors, solid-state diode
Non-single crystal, or recrystallized, semiconductor...
Non-single crystal, or recrystallized, material forms active...
257 50, 257 78, 257 94, 257 88, 257 90, 257200, 257290, 257347, H01L 2900
Patent
active
061570478
ABSTRACT:
A device structure provides improved efficiency of light emission from a light emitting element made of silicon while rendering such emission electrically controllable. Silicon in the light emitting element comprises fine microcrystals, which are miniaturized sufficiently to cause a quantum size effect. The microcrystals may be 10 nanometers (nm) or less in grain size. A dielectric film of 5 nm thick or less is formed containing therein such microcrystals. The microcrystal structure section is disposed between p- and n-type semiconductor layers. These layers are brought into electrical contact with the microcrystal structure only, while causing the remaining portions to be electrically insulative by a dielectric film or the like. Elementary particles of the opposite polarities, e.g. electrons and holes, are injected by tunnel effect into the microcrystals resulting in emission of light rays with increased efficiency.
REFERENCES:
K. Chen et al., "Visible Electroluminescenscence From Crystallized a-SiH/a-SiN.sub.x :H Multiquantum Well Structures", Journal of Non-Crystalline Solids, 198-200, p. 833-836 (1996).
G.S. Tompa et al., "UV-Visible-IR Electroluminescence From Si and Ge Nanocrystals in a Wider Bandgap Matrix", Mat. Res. Soc. Symp. Proc., vol. 358, p. 710-706, (1995).
L. Liao et al., "Visible Electroluminescence From Si.sup.+ -Implanted Sio.sub.2 Films Thermally Grown on Crystalline Si", Solid State Communications, 97(12), pp. 1039-1042 (1996).
Fujita Shinobu
Kurobe Atsushi
Abraham Fetsum
Kabushiki Kaisha Toshiba
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