Electron Mobility: Difference between revisions

Latest revision as of 23:43, 5 December 2015

claimed by djohnston35

What is Electron Mobility?

Electron mobility is the characteristic of a metal or semiconductor, which predicts the velocity at which an electron will travel when influenced by an electric field.

Electron mobility may also refer to a similar occurrence of charged particles in a liquid.

Note: Hole mobility is not the same concept as electron mobility and the numbers for these material properties will be different.

The drift velocity of electrons moving through a material, as a response to an electric field is designated as v, electron velocity.

Factors

The electron mobility is defined in units of cm^2/(V·s).

Mobility μ is a factor that impacts drift speed v through materials affected by an electric field E.

Conductivity σ in terms of electron mobility.

Current I in terms of charge density n, area of material A, charge q, and drift speed.

Applications and Fields

Higher mobility typically leads to better performance for semiconductors.

The electron mobility varies for different materials. A higher electron mobility will allow faster current flow and will allow electrical devices to be turned on and off more quickly. Electron mobility of Silicon is 1400 cm^2/Vs

Comparatively, indium antimonide has a mobility of 77,000 cm^2/Vs

At the University of Maryland, graphene has been recorded to have a mobility of 200,000 cm^2/Vs, and is also extremely thin. (How thin? Graphene is composed of a single layer of carbon atoms!) Such a combination could be extremely useful to the electronics industry, with electrons traveling 100 times faster in much less volume.

Electron mobility through a material is affected by external variables such as temperature. Increases in temperature will decrease the electron mobility by increasing frequency of collisions between electrons.

References

http://news.softpedia.com/news/Electrons-100-times-Faster-in-Graphene-81534.shtml

http://phys.org/news/2008-03-physicists-electrons-faster-graphene-silicon.html

https://en.wikibooks.org/wiki/Materials_in_Electronics/Electrons_in_Conductors

https://en.wikibooks.org/wiki/Semiconductors/What_is_a_Semiconductor

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-Electron Mobility
+claimed by djohnston35
-(claimed)
-PLEASE DO NOT EDIT THIS PAGE. COPY THIS TEMPLATE AND PASTE IT INTO A NEW PAGE FOR YOUR TOPIC.
-Short Description of Topic
-Contents [hide]
+==What is Electron Mobility?==
-The Main Idea
+Electron mobility is the characteristic of a metal or semiconductor, which predicts the velocity at which an electron will travel when influenced by an electric field.
-.1 A Mathematical Model
-.2 A Computational Model
-Examples
-.1 Simple
-.2 Middling
-.3 Difficult
-Connectedness
-History
-See also
-.1 Further reading
-.2 External links
-References
-The Main Idea[edit]
-State, in your own words, the main idea for this topic
+Electron mobility may also refer to a similar occurrence of charged particles in a liquid.
-A Mathematical Model[edit]
+Note: Hole mobility is not the same concept as electron mobility and the numbers for these material properties will be different.
-What are the mathematical equations that allow us to model this topic. For example dp⃗ dtsystem=F⃗ net where p is the momentum of the system and F is the net force from the surroundings.
-A Computational Model[edit]
+The drift velocity of electrons moving through a material, as a response to an electric field is designated as v, electron velocity.
-How do we visualize or predict using this topic. Consider embedding some vpython code here Teach hands-on with GlowScript
-Examples[edit]
+[[File:efieldsssd.png]]
-Be sure to show all steps in your solution and include diagrams whenever possible
-Simple[edit]
+==Factors==
-Middling[edit]
+The electron mobility is defined in units of cm^2/(V·s).
-Difficult[edit]
-Connectedness[edit]
-How is this topic connected to something that you are interested in?
-How is it connected to your major?
-Is there an interesting industrial application?
-History[edit]
-Put this idea in historical context. Give the reader the Who, What, When, Where, and Why.
-See also[edit]
+Mobility μ is a factor that impacts drift speed v through materials affected by an electric field E.
-Are there related topics or categories in this wiki resource for the curious reader to explore? How does this topic fit into that context?
-Further reading[edit]
+[[File:dfhdi.png]]
-Books, Articles or other print media on this topic
-External links[edit]
+Conductivity σ in terms of electron mobility.
-[1]
+[[File:ajdjjsjja.png]]
-References[edit]
+Current I in terms of charge density n, area of material A, charge q, and drift speed.
-This section contains the the references you used while writing this page
-Category: Electric Field
+[[File:aksk.png]]
+==Applications and Fields==
+Higher mobility typically leads to better performance for semiconductors.
+[[File:transsss.png]]
+The electron mobility varies for different materials. A  higher electron mobility will allow faster current flow and will allow electrical devices to be turned on and off more quickly.
+Electron mobility of Silicon is 1400 cm^2/Vs
+[[File:siliconbla.jpg]]
+Comparatively, indium antimonide has a mobility of 77,000 cm^2/Vs
+[[File:indiumantimonide.jpg]]
+At the University of Maryland, graphene has been recorded to have a mobility of 200,000 cm^2/Vs, and is also extremely thin. (How thin? Graphene is composed of a single layer of carbon atoms!) Such a combination could be extremely useful to the electronics industry, with electrons traveling 100 times faster in much less volume.
+[[File:graphenebla.jpg]]
+Electron mobility through a material is affected by external variables such as temperature. Increases in temperature will decrease the electron mobility by increasing frequency of collisions between electrons.
+== See also ==
+[[Conductivity]]
+[[Current]]
+[[Velocity]]
+==References==
+http://news.softpedia.com/news/Electrons-100-times-Faster-in-Graphene-81534.shtml
+http://phys.org/news/2008-03-physicists-electrons-faster-graphene-silicon.html
+https://en.wikibooks.org/wiki/Materials_in_Electronics/Electrons_in_Conductors
+https://en.wikibooks.org/wiki/Semiconductors/What_is_a_Semiconductor
+[[Category:Properties of Matter]]