Semiconductors
Semiconductors are an important part of CCD cameras (Charge-coupled Devices). They help to convert light into a current in the technology.
- n-doping
Here, silicon (Si) is doped with a material like phosphorus (P). This replaces some silicon atoms in the crystal.
The silicon bonds with the phosphorus but leaves behind an extra electron. This is loose inside the crystal and can be freed easily. This lets it conduct electricity.
The electrons that are freed have a negative charge, so the process is called n-doping.
James Van Allen
scientific instrument package (Rockoon).
Credit: NASA
Occupation: Space Scientist
Year born: 1914