0
in kJ/mol
1st 786.3
2d 1576.5
3d 3228.3
4th 4354.4
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoBecoz, they have more no. Of free electron's which are always ready to go to the valence band........
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Why leakage current of germanium is more than silicon?
Because the space charge region or depletion region is small in germanium compared to silicon hence leakage current is more in germanium than silicon
Why silicon is preferred over germanium in the fabrication of p-n junction diode?
Germanium diodes are more expensive than silicon ones, germanium is harder to process, germanium cannot be used to make integrated circuits (while early prototype integrated circuits were germanium the wiring between the integrated components cannot be integrated making it too expensive for production), germanium cannot operate with a junction temperature above 60C (silicon will operate up to 150C), and its reverse leakage current is greater. However! Germanium diodes have a lower forward voltage drop than silicon ones do, so they're better for some applications, like radio frequency detection.
Why was William Shockley in favor of germanium?
It was simply a matter of availability and ease of processing at the time. Germanium was available and much easier to purify to the ultrapure level needed in semiconductors. It took well over a decade for the technology to progress to the point that silicon could also be purified to the ultrapure level needed in semiconductors. Once silicon could be used it quickly replaced germanium in most applications because it has several physical properties that are better than germanium.
Is gold a better conductor than germanium?
Yes. Pure gold is a much better conductor than pure germanium is.
Is germanium natural or man made?
Germanium (Ge) is a natural element.Like all elements heavier than than Nickel and Iron, Germanium is naturally produced in supernova explosions of old massive stars.
Why germanium is better than silicon?
products made by silicon are more stable than those made by germanium
Why leakage current of germanium is more than silicon?
Because the space charge region or depletion region is small in germanium compared to silicon hence leakage current is more in germanium than silicon
Why is silicon a better semiconductor than germanium?
Silicon is a good semi conductor than germanium because silicon is more readily available, cheaper and stable.
Why silicon is the more semiconductor than germanium?
Silicon is more semiconductor than Germanium because the characteristics of silicon can be easily modified to obtain either a p-type or n-type material.
What is difference between silicon and germanium semiconductors?
Silicon has a larger bandgap energy than germanium, which contributes to higher junction potentials and ability to operate at higher temperatures.
Why silicon has more barrier potential than germanium?
Due to variation in energy gap between valance band and conduction band....
Why cut in voltage of silicon is more than that of germanium?
the valence band energy is different in the two substances,so the cut in voltage is different.
Why is the reverse saturation current of germanium diode more than silicon?
Germanium has four number of shells while Silicon has three number of shell. therefore for germanium less energy is required to move the electron from valence band to conduction band if compared to silicon. So at room temperature for germanium their are more number of electrons present in conduction bond hence more number of holes present in the valence energy band. Due to movement of holes reverse saturation current is produced. Their is more number of hole movement in germanium comparatively therefore reverse saturation current is more than silicon for germanium. You may refer to Electronic Devices and Circuits by Allen Mottershead Regards, Zain Ijaz UCTI, Malaysia Mechatronic Engineer.
Why is silicon more widely used than germanium?
because it can withstand more temperature compared to germanium and relatively cheaper and it is available abundantly in sand where as germanium is rare so Si has advantages than Ge though its conductivity is more compared to Si
Why silicon has low leakage of current as compared to germanium?
Each has four valence electrons, but germanium will at a given temperature have more free electrons and a higher conductivity. Silicon is by far the more widely used semiconductor for electronics, partly because it can be used at much higher temperatures than germanium.
When a sample of germanium and silicon having same impurity density are kept at room temperature then resistivity of both?
Resistivity of silicon higher than that of germanium
What type of bond is present in germanium?
Germanium atoms are hold together through covalent bonds, although they have more metallic character than carbon and silicon.
