Explain the term depletion region and potential barrier for a p-n junction.
Text Solution
Verified by Experts
Deplection region is a region created around the p-n junction which is devoid of free charge carriers and has immobile ions. It is created due to diffusion of majority carriers across the junction when p-n junction is formed. Potential barrier is a potential difference or junction voltage developed across the junction due to migration of majority carriers across it when p-n junction is formed. It opposes the further migration of majority carriers across the p-n junction due ti this junction voltage, it appears as if a fictitious battery is connected across the p-n junction, with its positive terminal to n-region and negative terminal to p-region of p-n junction. The value of potential barrier is 0.3 volt for germanium and 0.7 volt for silicon semiconductor diode.
|
Topper's Solved these Questions
ELECTRONIC DEVICES
PRADEEP|Exercise SAMPLE PROBLEM|2 Videos
ELECTRONIC DEVICES
PRADEEP|Exercise CONCEPTUAL PROBLEMS|1 Videos
ELECTROMAGNETIC WAVES
PRADEEP|Exercise II Focus multiple choice question|5 Videos
ELECTROSTATICS
PRADEEP|Exercise ASSERTION-REASON TYPE QUESTIONS|2 Videos
Similar Questions
Explore conceptually related problems
Explain the terms 'depletion layer' and 'potential barrier' in a p-n junction diode. How are the (a) width of depletion layer, and (b) value of potential barrier affected when the p-n junction is forward biased ?
Explain the formation of depletion layer and potential barrier in p-n junction. Draw the circuit diagram of a half wave rectifier and explain its working.
Explain the formation of depletion layer and potential barier in a p-n junction.
Explain with the help of a diagram the formation of depletion layer and potential barrier in a p-n junction.
Define the terms 'depletion layer and barrier potential' for a p-n junction. How does (i) an increase in the doping concentration, and (ii) biasing across the junction, affect the width of the depletion layer ?
How is a potential barrier formed in p-n junction diode ?
Write the two processes that take place in the formatioin for a p-n junction. Explain with the help of a diagram, the formation of depletion region and barrier potential in a p-n junction.
Explain with the help of a diagram, how depletion region and potential barrier are formed in a junction diode. If a small voltage is applied to a p-n junction diode how will the barrier potential be affected when it is (i) forward biased and (ii) reverse biased?
Write the two processes that take place in the formation of a p-njunction. Explain with the help of a diagram, the formation of depletion region and barrier potential in ap-n junction.
(a) Define the terms deplection layer and barrier potintial for a p-n jucntion (i) an increase in the doping concentration and (ii) biasing across the junction affect the width of the depletion layer (b) Draw the cirucit diagram of a p-n diode used a s a half wave rectifier explain its working
