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Is it possible to make a semiconductor by adding hexavalent or divalent impurity?
Wiki User
∙ 13y ago
Yes, it is possible to make such semiconductors.
Semiconductors made from group III and V elements use hexavalent or divalent impurities.
Example of such semiconductors are Aluminium Phosphide, Aluminium Arsenide, Gallium Arsenide, Gallium Nitride.
In these cases,
Donor atoms are Selenium, Tellurium, Silicon, Germanium and
Acceptor atoms are Beryllium, Zinc, Cadmium, Silicon, Germanium
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoSince trivalent impurities have less number of valence electron so when combined with holes they complete there octet by creating a large number of holes.Thus as a hole the materials becomes p type.
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Can hexavalent chromium be generated from grinding?
I didn't think it was possible but apparently it is (from grinding stainless steel, that is). I guess if the chromium metal gets hot enough from the friction of the grinding wheel, then some of the chrome will convert to chrome 6. Below is a link. See Table 2. Also see the authors comment before Table 2: "Surprisingly the highest numbers are from arc-air, grinding and welding". The report doesn't give many details. it would have been nice to know if maybe these welders were working in an area with another possible source of chrome 6 such as welding.
Why the polymerisation of benzene is not possible?
it is possible
What polygenic trait can have many possible genotypes and -?
Many possible genotypes, producing ,any possible phenotypes.
What is the possible reaction of ZnCl2 and Br2?
The reaction is not possible.
Is it possible to be every race?
Yes, very possible.
Why we don't we use iron as a semiconductor?
In a semiconductor like silicon or germanium, it's possible to control whether the material is a conductor or not. With iron, it's a conductor, and there's no way to control it.
Rice hulls as a potential semiconductor?
possible! Because rice hulls contain SiC (Silicon Carbide) and Si (Silicon) which are good semiconductor matrix for electronic related researches...greggymae
How do you make sodium chromate?
Chromic acid and ammonium hydroxide react to yield ammonium dichromate followed by crystallization to yield a pure crystalline product. H2Cr2O7 + 2NH4OH ==> (NH4)2Cr2O7 + 2H2O Reactions with the dichromate ion should be avoided if possible due to the toxicity and possible carcinogenic nature of hexavalent chromium. Groundwater contamination with hexavalent chromium was the subject of the Hollywood movie Erin Brockovich.
Is cardboard under electronics okay?
No it is not possible to define cardboard as a electronic because it can not full fill the requirement of electronics those are- they must be manufacture from semiconductor material they must be non linear in operation. they are semiconductor.
What is difference between ohmic and rectifying contact?
A p-n junction (or a metal-semiconductor junction) with rectifying behaviour is an electronic device which allows a one-way only current flow (between the two semiconductor regions, or between the metal and the semiconductor). An ohmic contact in a metal-semiconductor junction is realized by lowering the potential barrier (allowing electrons to easily migrate into the metal) and by increasing the doping levels in the semiconductor (more than 10^18 cm^-3): this way the potential barrier, that should stop electrons from migrating into the semiconductor, is confined in a very small region making it possible for electrons with low energy to pass through it (tunneling effect). This means that in a ohmic contact current can flow both ways; such a device apparently works like a resistor with a low resistance, hence the "ohmic contact" name.
Is it possible to run a continuous electric current through water?
Yes, provided there is no breakage in the circuit (the water is completely intact from electrode to electrode) and the water has some salt impurity (there is some salt dissolved in it).
What device made computer miniaturization possible?
The invention of the transistor is one answer. The invention of the semiconductor is another. Going further back... the invention of the valve.
Is it possible to have pure liquid water at -1celuis and why?
Yes, it is possible to super-cool water if it is very pure, the container is very clean and the water is kept from even tiny movements. I am not sure how to explain the principles, but it has something to do with some small impurity or disruption being needed to 'seed' the process of forming crystals.
What are the semiconductor materials used in computers?
A material that is neither a good conductor of electricity (like copper) nor a good insulator (like rubber). The most common semiconductor materials are silicon and germanium. These materials are then doped to create an excess or lack of electrons. Computer chips, both for CPU and RAM (or memory), are composed of semiconductor materials. Semiconductors make it possible to miniaturize electronic components, such as transistors. Not only does miniaturization mean that the components take up less space, it also means that they are faster and require less energy.
Is a transistor a semiconductor device?
Unfortunately no, it is nonlinear. But with careful selection of bias point, etc. it is usually possible to find a limited range of operation in which it approximates linearity well enough to be acceptable for the application.
Is it possible to create magnetic semiconductors that work at room temperature?
If you mean superconductors, no not yet. The best so far are the copper oxide ceramic superconductors that work at liquid nitrogen temperatures.I know of nothing called a "magnetic semiconductor".
Is einsteinium chemically reactive?
Einsteinium is a trivalent (but also divalent and possible tetravalent) actinide metal, moderate reactive; the electronegativity after Pauling is 1,3. Some compounds of einsteinium are: Es2O3, EsF3, EsCl3, EsBr3, EsI3, EsF2, EsCl2, EsI2, EsBr2, EsOCl, EsOBr, EsOI, Es(NO3)3, some organo-metallic compounds, etc.
