Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 1 (Q.No. 3)
The most commonly used semiconductor material is
mixture of silicon and germanium
none of the above
Answer: Option

Germanium is rarely used.

18 comments Page 1 of 2.

Nandini said:   1 decade ago
Silicon is used mostly because of its presence in abundance.

Abitha said:   1 decade ago
Silicon is mostly used. Germanium is very costly.

Rahul said:   1 decade ago
Silicon is easily available and cheap compare to germanium.

Rajat said:   10 years ago
Silicon have band gap 0.7 with compare to germanium 0.3 so that its more stable than germanium.

Rikimani said:   10 years ago
Silicon has energy gap of 0.7 eV and that of germanium has 0.3 eV. So it possible for germanium to jump electrons from valence band to the conduction band at nearly about room temperature. Hence get uncertain in its conduction. Thus silicon use most.

Seemanth said:   9 years ago
In silicon its valence electrons are closely bound to the nucleus. But in germanium valence electrons are too far away from nucleus and they are loosely bound. So si (14) and ge (32).

Nithya said:   9 years ago
Silicon has less leakage current. So si is preferred.

Korada prudhvi raj said:   9 years ago
1. Peak inverse voltage of germanium is less than silicon hence si gives better operable range.

2. E.g of ge is less than si hence si gives better operable range.

3. Secondary reason : Abundant raw material is available for si.

Rajivgandhi.M said:   8 years ago
Silicon is stable than Germanium.

Ajay p roy said:   8 years ago
I agree with Korada Prudhvi Raj.

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