Elementary electronics and semiconductors

In summary, the conversation discusses the difference between free electrons and holes in an undoped semiconductor bar, as well as the relationship between valence electrons and free electrons. The number of atoms is also mentioned, but it is noted that material constants for silicon are needed to calculate this value.
  • #1
bonildo
14
1

Homework Statement


http://postimg.org/image/hf6zpmykr/

Homework Equations


intrinsic carrier density = ni = 10^10/cm^3 (for Si at 300K)

The Attempt at a Solution


Its a really elementary problem but I can't figure out the difference between some quantities. For example, free electrons and holes would be in same quantity since the bar isn't dopped? Valence electrons and free electrons are the same thing ? And I can't see a way to calculate the numbers of atoms.
 
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  • #2
bonildo said:
For example, free electrons and holes would be in same quantity since the bar isn't dopped?
Right. And you have an equation that allows to find the product of those two numbers.

bonildo said:
Valence electrons and free electrons are the same thing ?
No.

How many valence electrons per silicon atom do you have?
The number of atoms is independent of the semiconductor properties, but you'll have to look up material constants for silicon.
 

What is an elementary electronic?

An elementary electronic is a basic building block of electronic circuits. It is a device that can control the flow of electrical current, such as a resistor, capacitor, or diode.

What are semiconductors?

Semiconductors are materials that have properties between those of conductors and insulators. They have the ability to conduct electricity under certain conditions, making them essential components in electronic devices.

How do semiconductors work?

Semiconductors work by having a specific amount of electrons in their outermost energy level. This allows them to either donate or accept electrons from neighboring atoms, creating a flow of electricity.

What are the most common types of semiconductors?

The most common types of semiconductors are silicon and germanium. These elements are used to make computer chips and other electronic components due to their ability to easily conduct electricity.

What are some common applications of elementary electronics and semiconductors?

Elementary electronics and semiconductors are used in a wide range of applications, including computers, televisions, cell phones, and other electronic devices. They are also used in solar panels, LED lights, and medical equipment.

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