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# EE 305 Semiconductor Devices Assignment

```American University of Middle East
Class Assignment W8
```

Question 1 [10%]

Consider a silicon semiconductor at room temperature (π = 300 πΎ). Given that:

ππ· = 3 Γ 1017 cmβ3 and ππ΄ = 2 Γ 1014 cmβ3

1. [1%] Determine whether this semiconductor is n-type, or p-type.
2. [2%] Draw a detailed energy band diagram for this semiconductor with showing the following:
• πΈπΆ,ππ’π π‘ πππππ‘πππ
• πΈπ,ππ’π π‘ πππππ‘πππ
• πΈπ, π βππ€ ππ‘π  π£πππ’π
• πΈπ
• πΈπΉ
3. [1%] Calculate the total number of free electrons?
4. [1%] Calculate the total number of holes?
5. [1%] which carriers are considered as majority carriers and which carriers are considered as minority carriers?
6. [1%] Calculate πΈπΉ β πΈπΆ ππ π½ππ’ππ πππ ππ ππ
7. [1%] Calculate πΈπΉ β πΈπ ππ π½ππ’ππ πππ ππ ππ
8. [1%] Calculate πΈπΉ β πΈπ ππ π½ππ’ππ πππ ππ ππ
9. [1%] if ππ· = ππ΄ = 3 Γ 1017 ππβ3, is this semiconductor extrinsic? Why?

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