All correct. One may also add that Ge has

a) twice the thermal expansion coefficient of silicon (-> thermal stress) and

b) half the heat conductivity of silicon (-> less suitable for power electronics).

I agree with all arguments written above and I would like to add one more important reason.

Germanium has about twice smaller energy bangap then Si so the maximum operation temeperature of Ge transistors is significantly

smaller than for Si transistors.

In agreement with what is written above I would add also the following. Around the middle of 20th century Simens launches Si-based development and deployment program. Si is preferred to Ge due to its higher temperature, at which begins to dominate intrinsic conductivity (related to the larger Si bandgap) and the less expensive yield (from the sand). At that time, the high quality of the Si / SiO2 interface is not yet known.

Ge bandgap is 0.3 V for np junction, Si bandgap is 0.7 V for np junction.

Almost all answer are correct but for with silicon technology, SiO2 is major reason behind popularity of Si technology than other...

just a remark that the values Gregory quotes are the turn-on voltages for transistors, which are aroughly given by the built-in voltages of the pn junctions (~0.2 eV for Ge and 0.55eV for Si), but these are not the bandgaps (which are about twice as large).

All the answers are correct, in particular the thermal conductivity and tendency of natural passivisation makes Si preferable over Ge.

for available oxide, and cheap but matured technology

Silicon as a semiconductor has wider bandgap than germanium and therefore it can be operated at a much higher temperature up to 120 degree centigrade . It interstice concentration is much less than Ge and therefore the reverse saturation current has much less values for Si which means less of currents. It breakdown voltage is greater than Ge for the same doping. It has a silicon dioxide which is very superior insulator that can be used as a constructing layers for the devices while GeO dissolves in water. Si is suitable for the planar integrated circuit technology.

In summary silicon is a prevailing semicondcutor material.

For more information please follow the link:https://www.researchgate.net/post/Why_and_how_is_silicon_prevailing_as_a_semiconductor

Best wishes

'Si' has some advantages compared to 'Ge':

1. Availability and cheaper .

2. Stability is more .

3. low reverse saturation current .

Leakage current is less in silicon made devices than germanium made since its energy bandgap is more than that of germanium.