# 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 πΎ). Given that:

π_{π· }= 3 Γ 10^{17} cm^{β3} and π_{π΄ }= 2 Γ 10^{14} cm^{β3}

- [1%] Determine whether this semiconductor is n-type, or p-type.
- [2%] Draw a detailed energy band diagram for this semiconductor with showing the following:
- πΈ
_{πΆ},ππ’π π‘ πππππ‘πππ - πΈ
_{π},ππ’π π‘ πππππ‘πππ - πΈ
_{π}, π βππ€ ππ‘π π£πππ’π - πΈ
_{π} - πΈ
_{πΉ}

- πΈ
- [1%] Calculate the total number of free electrons?
- [1%] Calculate the total number of holes?
- [1%] which carriers are considered as majority carriers and which carriers are considered as minority carriers?
- [1%] Calculate πΈ
_{πΉ }β πΈ_{πΆ}ππ π½ππ’ππ πππ ππ ππ - [1%] Calculate πΈ
_{πΉ }β πΈ_{π}ππ π½ππ’ππ πππ ππ ππ - [1%] Calculate πΈ
_{πΉ }β πΈ_{π}ππ π½ππ’ππ πππ ππ ππ - [1%] if π
_{π· }= π_{π΄ }= 3 Γ 10^{17}ππ^{β3}, is this semiconductor extrinsic? Why?

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