Question

Intrinsic carrier concentration of a silicon sample at 300 K is 1.5x 10¹ m3. After doping, the number of majority carriers is 2.25 x 1020 m³. The minority carrier density is​

Answer 1

Answer:

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Answer 2

Explanation:

Given Intrinsic carrier concentration of a silicon sample at 300 K is 1.5 x 10^10 m3. After doping, the number of majority carriers is 2.25 x 1020 m³. The minority carrier density is

• So given is n type semi conductor.
• Doping concentration or donor concentration
•                               Nd = 2.25 x 10^20 m^3  
•                             So Nd is approximately equal to Nn (electron concentration under equilibrium)
• Now to find minority carriers using mass action law  
• under thermal equilibrium the product of total positive charge and total negative charge is always constant and is equal to square of intrinsic carrier concentration.
•                                               N.P = Ni^2  
•                   for n type Nn Pn = Ni^2
•                                     Np Pn = Ni^2
•                                     So Pn = Ni^2 / Np
•                                          Pn = (1.5 x 10^10)^2 / 2.25 x 10^20
•                                                = 1.0 / cm^3

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https://brainly.in/question/8537702