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1. US20030010973 - Polymer semiconductor device comprising at least a rectifying function and method for making same

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[ EN ]

What is claimed is:

1. A semiconductor device comprising:
a polymer having at least one rectifying function produced by a layer of the polymer between first and second parallel electrodes, wherein:
the layer of the polymer includes a host matrix for polar molecules,
the polar molecules are oriented perpendicular to the first and second electrodes,
electrical charges of the polar molecules are aligned in a direction towards the first and second electrodes, and
said orientation of the polar molecules induces an electric field inside the layer of the polymer.
 
2. A device according to claim 1, wherein said polar molecules are molecules doping the host matrix.
 
3. device according to claim 1, wherein said polar molecules are molecules grafted into the host matrix.
 
4. A device according to claim 1, wherein said polar molecules have an electron acceptor group and an electron donor group separated by one or more groups comprising conjugated π electron systems.
 
5. A device according to claim 1, wherein the host matrix is based on a polymer chosen from among polythiophene, polyparaphenylene, poly-paraphenylenevinylene, poly-methyl methacrylate, polyvinyl carbazole, polycarbonate, polystyrene and polyvinyl chloride.
 
6. A device according to claim 1, further comprising:
a substrate supporting the first electrode,
wherein at least one of the substrate, the first electrode, and the second electrode is transparent.
 
7. A device according to claim 6, wherein the substrate supporting the first electrode comprises at least one of glass and plastic.
 
8. A device according to claim 1, comprising:
a conductive substrate used both as a support and as the first electrode.
 
9. A device according to claim 6, comprising:
a photocell, said polar molecules including molecules of 4-amino-4′-nitrobenzene.
 
10. A device according to claim 6, comprising:
an electroluminescent diode, said polar molecules including molecules of 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyrane.
 
11. Use of the semiconductor device according to claim 1 as a diode.
 
12. Use of the semiconductor device according to claim 1 as an electroluminescent diode.
 
13. Use of the semiconductor device according to claim 1 as a photovoltaic diode.
 
14. Use of the semiconductor device according to claim 1 as an active semi-conductive layer for a field effect type transistor.