What are the differences between silicon and germanium semiconductor?
Silicon and germanium have four valence electrons but at the given temperature germanium will have more free electrons and higher conductivity than silicon. Silicon is more widely used in the electronic device than germanium since it can be used at a higher temperature. Was this answer helpful?
Why are silicon and germanium used as semiconductors?
Silicon and germanium are used here effectively because they have 4 valence electrons in their outermost shell, which gives them the ability to gain or lose electrons equally at the same time.
Why silicon and germanium are known as semiconductors explain the properties of the same?
Since they are in the same column, we know that silicon and germanium have the same number of electrons in their outer or valence shell. 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.
What is silicon and germanium used for?
Silicon-germanium is an important material that is used for the fabrication of SiGe heterojunction bipolar transistors and strained Si metal-oxide-semiconductor (MOS ) transistors for advanced complementary metal-oxide-semiconductor (CMOS ) and BiCMOS (bipolar CMOS) technologies.
What are the electrical properties of Ge and Si?
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.
What are the properties of germanium?
Pure germanium is a hard, lustrous, gray-white, brittle metalloid. It has a diamondlike crystalline structure and it is similar in chemical and physical properties to silicon. Germanium is stable in air and water, and is unaffected by alkalis and acids, except nitric acid.
Why Si and Ge are preferred semiconductors?
Why is Silicon preferred over Germanium for semiconductor? The reason is, Silicon can be worked at a higher temperature as compared to germanium. The structure of Germanium crystals will be destroyed at higher temperature. Also, Silicon has much smaller leakage current than that of germanium.
What are the 3 properties of semiconductors?
4 Important Properties of Semiconductors
- Property 1:The resistivity of a semiconductor is less than an insulator but higher than a conductor.
- Property 2: Semiconductors show a negative temperature coefficient of resistance.
- Property 3: At zero kelvin, semiconductors behave as insulators.
What are the properties of silicon?
Silicon Properties
- Exists as a solid at room temperature and pressure.
- Has a metallic luster (a metal-like appearance)
- It is very brittle.
- It is a semiconductor (can be made to conduct electricity under certain conditions)
- Melting point: 1410 degrees Celsius.
- Boiling point: 3265 degrees Celsius.
- Density: 2.33 g/cm3.
Which is more stable germanium or silicon?
Also, thermal stability of silicon is better than germanium.
Why is germanium more conductive than silicon?
Germanium: Germanium also possesses 4 valence electron (2, 8, 18, 4). It has low resistance than Silicon, i.e. it is a better conductor (although it is a semiconductor), whereas Silicone is a better semiconductor.
What are 5 physical properties of germanium?
Why is germanium used as a semiconductor?
In solid state electronics, either pure silicon or germanium may be used as the intrinsic semiconductor which forms the starting point for fabrication. Each has four valence electrons, but germanium will at a given temperature have more free electrons and a higher conductivity.
What are the advantages of germanium?
Advantages of Germanium Detectors
Germanium is preferred because its atomic number is much higher than silicon, which increases the probability of gamma-ray interaction. Germanium has lower average energy necessary to create an electron-hole pair, which is 3.6 eV for silicon and 2.9 eV for germanium.
Why Si and Ge are not used in LED?
Light Emitting Diode Structure
Silicon and germanium are not suitable because those junctions produce heat and no appreciable IR or visible light.
What are the 2 types of semiconductors?
Semiconductors are divided into two categories: Intrinsic Semiconductor. Extrinsic Semiconductor.
What is semiconductor and its property?
Semiconductors possess specific electrical properties. A substance that conducts electricity is called a conductor, and a substance that does not conduct electricity is called an insulator. Semiconductors are substances with properties somewhere between them. Electrical properties can be indicated by resistivity.
What is germanium used for?
In addition to its applications in electronic devices, germanium is used as a component of alloys and in phosphors for fluorescent lamps. Because germanium is transparent to infrared radiation, it is employed in equipment used for detecting and measuring such radiation, such as windows and lenses.
Why Si is a better insulator than Ge?
Which has more conductivity silicon or germanium?
What are properties of germanium?
Which is more stable silicon or germanium?
Good Temperature Stability
The temperature stability of silicon is better than germanium.
Why is PN junction used?
P-N junction diode can be used as a photodiode as the diode is sensitive to the light when the configuration of the diode is reverse-biased. It can be used as a solar cell.
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Applications of P-N Junction Diode.
| Semiconductor Diode | Zener Diode |
|---|---|
| Extrinsic Semiconductors | Electric Field Lines |
Why silicon is not used in laser?
Silicon, the material par excellence for electronics, is not used for light sources because of the lack of efficient light emitters and lasers.