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Elemental germanium is used as a semiconductor in transistors and various other electronic devices. Historically, the first decade of semiconductor electronics was based entirely on germanium. Presently, the major end uses are fibre-optic systems, infrared optics, solar cell applications, and light-emitting diodes (LEDs).
A compound semiconductor is a semiconductor compound composed of chemical elements of at least two different species. These semiconductors form for example in periodic table groups 13–15 (old groups III–V), for example of elements from the Boron group (old group III, boron, aluminium, gallium, indium) and from group 15 (old group V, nitrogen, phosphorus, arsenic, antimony, bismuth).
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SiGe (/ ˈ s ɪ ɡ iː / or / ˈ s aɪ dʒ iː /), or silicon–germanium, is an alloy with any molar ratio of silicon and germanium, i.e. with a molecular formula of the form Si 1−x Ge x. It is commonly used as a semiconductor material in integrated circuits (ICs) for heterojunction bipolar transistors or as a strain-inducing layer for CMOS ...
The metalloids; germanium (first used in 1947) and silicon (first used in 1954)—in amorphous, polycrystalline and monocrystalline form. The compounds gallium arsenide (1966) and silicon carbide (1997). The alloy silicon–germanium (1989) The allotrope of carbon graphene (research ongoing since 2004), etc. (see Semiconductor material).
Germanium detectors are mostly used for gamma spectroscopy in nuclear physics, as well as x-ray spectroscopy. While silicon detectors cannot be thicker than a few millimeters, germanium can have a sensitive layer ( depletion region ) thickness of centimeters, and therefore can be used as a total absorption detector for gamma rays up to a few MeV.
Organogermanium compounds are used in relatively few commercial applications. Isobutylgermane, a volatile colorless liquid, is used in MOVPE (Metalorganic Vapor Phase Epitaxy) in the deposition of Ge semiconductor films. Propagermanium, also known as Ge-132, and spirogermanium are drugs. [citation needed]
The material is created in a process similar to that of silicene and graphene, in which high vacuum and high temperature are used to deposit a layer of germanium atoms on a substrate. [ 2 ] [ 3 ] [ 4 ] High-quality thin films of germanene have revealed unusual two-dimensional structures with novel electronic properties suitable for ...