Want this question answered?
LEDs are made from binary semiconductors (e.g. gallium aluminum indium phosphide) not unary semiconductors (e.g. silicon, germanium) because they can be made transparent to light. Silicon & germanium are opaque.
silicon carbide
No. Silicon carbide is covalent.
Silicon carbide is a compound of silicon and carbon with chemical formula SiC. Silicon carbide was discovered by the American inventor Edward G. Acheson in 1891. Some cutting tools are created with Silicon carbide.
silicon and carbon
A: Because the element has different property as gallium arsenide.
* silicon * germanium * gallium arsenide * etc.
Silicon and Germanium are not used to make LEDs.They are opaque to visible lightThey have the wrong type of band gap (direct instead of indirect).LEDs are made with binary semiconductors, like:Indium Gallium NitrideSilicon CarbideIndium PhosphideGallium Indium Arsenide NitrideIndium Gallium Aluminum Phosphideetc.
A supercomputer using gallium arsenide instead of silicon for its semiconductor components. Gallium arsenide is much faster than silicon so it helps significantly in getting the performance needed by a supercomputer, but it is much harder to fabricate resulting in an increase in price.
Richard Carl Eden has written: 'Photoemission studies of the electronic band structures of gallium arsenide, gallium phosphide, and silicon' -- subject(s): Silicon, Electrons, Gallium arsenide, Gallium Phosphide, Emission
I think because GaAs has a direct band gap transition but Si and Ge has indirect band gap transition. Both silicon and germanium are opaque and thus cannot be used to make LASERs.
Gallium is a metal, not a semiconductor. You cannot build a transistor or even a diode with a piece of metal, forget an IC chip containing several transistors.To create a gallium based semiconductor, it must be ALLOYED with one or more of the following elements: nitrogen, phosphorus, arsenic, or antimony. The simplest semiconductor alloys are: gallium nitride, gallium phosphide, gallium arsenide, and gallium antimonide. Examples of other semiconductor alloys are: gallium nitride phosphide, gallium phosphide arsenide, etc. (these are used in some types of LEDs).The most common gallium alloy semiconductor for making transistors and IC chips is gallium arsenide. Compared to both silicon and germanium, transistors made of gallium arsenide are significantly faster, and additional speed can be obtained by using nonsaturating logic circuits like ECL.
Power diodes are made primarily of silicon, though small quantities of other materials, such as boron, gallium arsenide, germanium or phosphorous are also used.
Semiconductors such as silicon, germanium and gallium arsenide (GaAs) have negative temperature coefficient.
both
Mostly silicon but other compounds such as gallium arsenide are also used.
The other materials other than just silicon used to make semiconductors and other solid state electronic devices are germanium and gallium arsenide.