Probdem 2. (20 points) Consider a semiconductor below. Your answers need to be c

Question

Probdem 2. (20 points) Consider a semiconductor below. Your answers need to be clear and complete. described schematically by the figure Carrier Concentration a. The conventional drifit current for electrons in the conduction band will be either in the +x ordirection. Determine this direction and cxplain the reasons for your choice of direction.(5 pts) b. The conventional drin current for hole will be in either the-x o-x direction. cione the appropriate direction and explain the reasons ferourhoice of dinection. (5 pts.) c. Explain why the conventional diffusion current for holes is in the x direction for this semiconductor. (5 pts.) d. Based on the diagram, is this semiconductor n-type or p-type.? Explain your answer. (5 pts.)

Explanation / Answer

A)the conventional drift current for electrons in the conduction band is towards +x direction.Because due to the electric current or movement of the charge carrier and the electrons and holes are the minority charge carriers in the p region and n regionand thus is due ti the diffusion of charge carriers

B)the conventional drift current for the holes is in +x direction reason for that direvtion is the charger carriers moving from the minority to majority charge carriers and due to this some electric field is applied across the semiconductor material andand thr cahrge carriers attain some drift velocity for thus reason that +x direction is choosed

C)the conventional diffusion current is in the -x direction because of the mobility charger carriers which contain holes as the majority charge carriersand the diffusion take place due to the change in the concentration of the carrier particles and not the concentrations of themselves due to the flow of holes and electrons there is cuurent the change in the concentration of the carrier particles develops gradients

D)based on the diagram the given semiconductor is the p-type in this the transfer of charge particles takes place from higher concentration to lower concentration in which holes are the major and electrons are the minor and this diffusion current is due to the variation in the carrier concentration and wheras in drift current it is used by electric fieldsamd the direction depends on the slope of the carrier concentration whereas the direction of drift current always in the direction of the electric field

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