Semiconductor Notation: P-Type, N-Type Band Gap Materials

  • Context: Undergrad 
  • Thread starter Thread starter radaballer
  • Start date Start date
  • Tags Tags
    Notation Semiconductor
Click For Summary

Discussion Overview

The discussion revolves around the materials used in semiconductors, specifically focusing on how to determine the p-type and n-type compositions in materials like aluminum gallium arsenide. Participants explore the structural differences necessary for creating band gaps and the implications of geometric structure on semiconductor properties.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions how to identify the p-type and n-type components in semiconductors and suggests that structural differences should exist to create a band gap.
  • Another participant argues that differences in geometric structure should be avoided to prevent cracks and flaws in the crystal, emphasizing the importance of doping a base crystal to create specific types of semiconductors.
  • A third participant shares their experience of intentionally introducing structural differences in their graduate research, noting that this approach led to novel characteristics but deviated from traditional crystal definitions.
  • A later reply mentions a contrasting research experience focused on combining crystals with similar lattice constants to explore resulting phenomena.

Areas of Agreement / Disagreement

Participants express differing views on the role of geometric structure in semiconductor properties, with some advocating for uniformity while others explore the effects of structural variations. The discussion remains unresolved regarding the optimal approach to semiconductor design.

Contextual Notes

Participants reference specific materials and research experiences, indicating a reliance on personal research contexts and definitions that may not be universally applicable. The implications of structural differences on semiconductor functionality are not fully explored.

radaballer
Messages
86
Reaction score
0
If you research the materials semiconductors are made of you will find things such as aluminum gallium arsenide. How do you determine what the p-type and n-type are made of? Shouldn't there be a structural difference in order to create band gap?
 
Physics news on Phys.org
You want to avoid differences to the geometric structure if you can - or you get cracks and flaws in the crystal that mess up the electronics.

To make a specific type of semiconductor you start with the base crystal and then dope it.
The odd mixtures come from trying out different combinations and crystal growth techniques.
 
Most may want to avoid differences in geometric structure. My graduate research was about purposefully introducing differences in structure and exploring the novel characteristics that resulted. But then, our material no longer technically qualified as a "crystal".

To be clear, nothing I or my group was making was a commercial product. It was science, not engineering. :p
 
Neat - my graduate research was exactly the opposite - combining crystals with almost the same lattice constant and exploring the novel stuff that happened :)
 

Similar threads

  • · Replies 7 ·
Replies
7
Views
4K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 0 ·
Replies
0
Views
3K
  • · Replies 12 ·
Replies
12
Views
4K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 3 ·
Replies
3
Views
6K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 2 ·
Replies
2
Views
14K