Intrinsic & Extrinsic Semiconductors
Statement I: By doping silicon semiconductor with pentavalent material, the electrons density increases.
Statement II: The n-type semiconductor has net negative charge.
In the light of the above statements, choose the most appropriate answer from the options given below:
Show answer and solution
Answer: (a)
- Statement I: pentavalent donors add free electrons, so electron density increases: true.
- Statement II: each donor that gives an electron becomes a fixed positive ion, so the crystal stays electrically neutral: false.
- So the answer is (a).