Answer: The potential Barrier of Silicon is more compared to Germanium which makes Ge more conductive as compared to Si. ... At room temperature, Silicon crystal has fewer free electrons than Germanium crystal. This implies that silicon will have much smaller Collector cut off current than Germanium.
Which is better conductor germanium or silicon?
Which is better conductor silicon or germanium? Germanium is a better conductor (although it is a semiconductor), whereas Silicone is a better semiconductor. At room temperature Si crystal has almost no free electrons as compared to Ge crystal, this is because Si has more band gap than Ge.
Why is silicon conductive at room temperature?
At room temperature, a semiconductor has enough free electrons to allow it to conduct current . ... When the electron is bound, and thus cannot participate in conduction, the electron is at a low energy state. Therefore, the presence of the bond between the two atoms introduces two distinct energy states for the electrons.
What is the conductivity of silicon at room temperature?
The room- temperature conductivity of germanium and silicon is 0-64 and 1-45 watt units respectively.
What is the effect of temperature on conductivity of silicon and germanium?
The conductivity of intrinsic semiconductor increases with in increase in temperature . In other words, the resistivity of an intrinsic semiconductors decreases as the temperature increases.
Is silicon a good insulator?
Silicon is a semiconductor. It can conduct electricity as well as behave as an insulator by varying it’s properties . Silicon is currently the most used material in space semiconductor devices. The conductivity of silicon lies between the conductivity limits of conductors and insulators.
Why germanium is a semiconductor?
Germanium atoms have one more shell than silicon atoms, but what makes for the interesting semiconductor properties is the fact that both have four electrons in the valence shell . As a consequence, both materials readily constitute themselves as crystal lattices. ... The process of adding these atoms is known as doping.
Is silicone electrically conductive?
Pure silicone is naturally an electrical insulator, which is normally desired for medical device applications. New innovative medical applications which require a flexible and biocompatible, but electrically conductive rubber however, are now in the development pipeline.
Is silicon a shiny?
Named from the Latin word meaning “flint,” silicon is a shiny, blue-gray metallic substance . It looks like a metal, but its other characteristics are more non-metallic than metallic. It is the second-most common element in the Earth’s crust, mostly in the form of silica (SiO2).
Why band gap of silicon is more than germanium?
The electrons in the silicon atoms are more tightly bound to the nucleus than the electrons of the germanium atom due to its small size . This is the reason why the band gap of silicon is more than that of germanium.
Why do semiconductors increase in conductivity with temperature?
When temperature is increased in case of a semiconductor the free electron gets more energy to cross the energy gap to the conduction band from the valence band .so now more electrons can go easily to the conduction band so resistance decreases with temperature.
Is silicon a semiconductor?
Semiconductors are widely used in familiar electric appliances such as personal computers, televisions, smartphones, digital cameras, IC cards, etc. The material most frequently used in semiconductors is Silicon (chemical symbol = Si).
Which is pure semiconductor?
An intrinsic (pure) semiconductor, also called an undoped semiconductor or i-type semiconductor , is a pure semiconductor without any significant dopant species present. ... In intrinsic semiconductors the number of excited electrons and the number of holes are equal: n = p.
What is the conductivity of germanium?
| Germanium | Thermal conductivity 60.2 W/(m⋅K) | Electrical resistivity 1 Ω⋅m (at 20 °C) | Band gap 0.67 eV (at 300 K) | Magnetic ordering diamagnetic |
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What is the resistivity of germanium?
| Material Resistivity ρ (ohm m) | Nichrome (Ni,Fe,Cr alloy) 100 x10 – 8 | Constantan 49 x10 – 8 | Carbon* (graphite) 3-60 x10 – 5 | Germanium* 1-500 x10 – 3 |
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What is the conductivity of silicon?
| Material Resistivity (Ω-cm) Conductivity (Ω- 1 -cm- 1 ) | Germanium 1-500 x 10 – 3 2.0 to 1.00 × 10 3 | Silicon 0.10- 60 1.67 × 10 – 2 to 10 | Metals | Silver 1.63 x 10 – 8 6.17 × 10 7 |
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