Question

why we use semiconductor instead of metal in Thermopile?​

Answer 1

Semiconductors need less power and it can function at very low voltage. Previously mathematical operation and computation electronics were carried out with “vacuum tube technology”.

Answer 2

Answer:

Metal is a type of conductor metal. The last orbital has 1,2 or 3 electrons. As a result, it will be able to easily exchange the electrons in its latest orbit. For example: Na, its last orbit has 1 electron. If 1 lakh Na is taken, they will be able to participate in the exchange of 1 lakh free electrons from their last orbit. In this case the number of exchanged electrons is fixed.

But in the case of semiconductors, the electrons in the last orbit are bound by covalent bonds. As a result, they do not have any free electrons. But if the temperature is increased then the vibrations in the metals will increase. As a result, some electrons will be released from the metals. In this case we can release the required number of electrons with the help of temperature or vibration. For example: Si whose last orbital electrons are bound by covalent bonds. So Si has no free electrons. But if the Si metal is given heat, the vibrations between the Si metals will increase. As a result, some of the electrons in silicon will be released. In this case, we can free up 50 or 100 or 1000 electrons from silicon as required by increasing the temperature, which is not possible in the case of metal.

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