Calculating Charge Carrier Density in Materials: Formula and Table of Values

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    Carrier Charge Density
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Discussion Overview

The discussion revolves around the calculation of charge carrier density in materials, specifically focusing on the search for formulas and tables of values. Participants explore the differences in properties between metals and semiconductors, and specific materials like graphite and TaN are mentioned in the context of a Hall probe project.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant requests a formula or table for calculating charge carrier density, indicating difficulty in finding such resources.
  • Another participant suggests a specific website containing formulas, emphasizing the importance of focusing on the formulas rather than images.
  • A participant notes that there is no general formula applicable to all materials, highlighting the differing properties of metals and semiconductors and asks for clarification on the type of material in question.
  • One participant shares their experience of using the suggested website in a solid state physics course, indicating its relevance to the discussion.
  • A participant mentions a specific material, graphite (ex70), and expresses a need for charge carrier density values for materials relevant to a Hall probe project.
  • Another participant provides a specific charge carrier density value for TaN and asks for clarification on how this value is derived.

Areas of Agreement / Disagreement

Participants do not reach a consensus on a specific formula or table for charge carrier density, and multiple competing views regarding the applicability of formulas to different materials remain. The discussion includes both requests for information and shared experiences without resolving the initial query.

Contextual Notes

The discussion highlights the lack of a universal formula for charge carrier density, indicating that the properties of different materials (metals vs. semiconductors) affect the calculations. There are also unresolved questions regarding the derivation of specific values mentioned.

Who May Find This Useful

This discussion may be useful for individuals interested in materials science, solid state physics, or those working on projects involving charge carrier density calculations, such as Hall probe applications.

plasmabrain
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I've been trying to find a formula for calculating charge carrier density of a material, or a table of values , but can't seem to find any. If anyone knows of a link to a formula or table, any help would be welcome.

Thanks,
Plas
 
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there's no general formula since metals and semiconductors have very different properities. did you have metals or semicondutors in mind or both?
 
marlon said:
Check out formula's 18 and others of this site :

http://britneyspears.ac/physics/basics/basics.htm

marlon

ps : look at the formula's, NOT the pictures... Remain focussed...It is not easy to study physics

haha. we used that page at a solid state physics course I took.
 
inha said:
haha. we used that page at a solid state physics course I took.

same here

marlon
 
marlon said:
same here

marlon

Baby, hit me one more time.
 
I was actually wondering about graphite, ex70 in particular (1.85 g/cm2).

Basically, I'm trying to find good materials for a Hall probe project I'm working on, and I'm considering what I have laying around, but can't find values for anything I have.

Plas
 
how?

I find this
In TaN, each Ta atom contributes three electrons to the N 2p band and two electrons to the 5d conduction band, resulting in a charge carrier density n = 9.7 X 10to power 22 cm−3
how? any idea?
 

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