Thermo-electric conversion element

H - Electricity – 01 – L

Patent

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Details

H01L 35/14 (2006.01) H01L 35/04 (2006.01) H01L 35/08 (2006.01) H01L 35/22 (2006.01) H01L 35/32 (2006.01)

Patent

CA 2282547

With the thermo-electric conversion element according to the present invention, the power generating efficiency (in other words, the conversion efficiency) can be improved by inserting as metallic film made of either Ag, Al, or silver soldering material for the PN junction formation between the Si based P type and N type semiconductors and inserting a metallic film made of either Zn, Ni, Cu, Ag, Au, or Cu-30Zn at a connecting portion between the semiconductors and lead wires, so that the electromotive power and the thermo-electromotive force are not cancelled each other due to the Schottky barrier which is generated at the interfacial area between the metals and semiconductors. The desired thermo-electric conversion efficiency can be achieved by the material presented in this invention without any deterioration of the original thermo-electric properties.

Cette invention concerne un élément thermoélectrique qui comprend les éléments suivants: un semi-conducteur de type p qui se compose d'un nouveau matériau thermoélectrique à base de silicium; un semi-conducteur de type n qui forme une jonction pn avec le semi-conducteur de type p; et enfin, des conducteurs qui sont connectés aux semi-conducteurs par un métal de soudure. La jonction pn ainsi que les connexions entre le semi-conducteur et les conducteurs vont produire une force thermo-électromotrice élevée. On utilise de l'Ag, de l'Al et du métal d'apport à base d'argent, ou un alliage de ces derniers, pour effectuer la connexion entre, d'une part, le semi-conducteur de type p à base de silicium et dopé par quelques éléments et, d'autre part, le semi-conducteur de type n. On utilise en revanche du Zn, du Ni, du Cu, de l'Ag et de l'Au ou leur alliage afin de connecter les conducteurs aux semi-conducteurs, ce qui permet ainsi d'obtenir un élément thermoélectrique d'une grande efficacité.

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