In the first semester I followed circuit analysis videos in this channel after missing the lectures in school and thanks to this channel I scored an A grade And this second semester I hope I’ll have score in analog electronics as well as that of circuit analysis Million thanks NESO ACADEMY 🙏
Hello, I'm here to tell you your videos really helped, I did my final exam well I almost thought I would either fail or pass on a border mark but scored decently. THANK YOUUUU
@@222allmywishescometrue I was an Electronics and Communication engineering student. Don't panic about the course you have taken up, in my experience, trying to learn something from the subject for no reason, using help of such channels has helped me. Enjoy learning as you never know if you'd get the opportunity again. Wishing you the best 😊💜
@@222allmywishescometrue Ouchh.. must be difficult. Do take help from any helpful faculty tho, your efforts would definitely show if you're consistent. The fact that you're even here shows you're working in some direction. All the very best to you!!
Sir , seriously I am saying that...it is the best video on pn junction in RUclips...I have many questions on it so see almost other's channel video....but it's best because it give me every question answer...but sir if you explain more on drift current as like diffusion current..it will superb...thnx again
Discussing electron and hole movement is like describing a picture and it's mirror image at the same time. A complete understanding of P-N junction theory can be done with electron flow alone. Dr. Shockley invented the idea of "holes" because it greatly simplified his math. But it is unnecessarily confusing and .adds nothing but extra work to the physical understanding/
00:06 Introduction to semiconductor diodes and formation of PN Junction diode 02:39 Biasing of PN Junction Diode 04:52 Combining p-type and n-type semiconductors creates a junction with majority charge carriers as holes and electrons. 06:51 Concentration gradient drives movement of charge carriers 09:02 Depletion region is formed in PN Junction diode due to uncovered immobile ions. 11:28 Understanding majority and minority charge carriers in a PN junction diode 14:15 Depletion region width is fixed due to barrier potential 16:08 Drift current is due to minority charge carriers.
Absolutely beautiful explanation of pn junction diode. I have studied it earlier many times, always had some doubts, but you cleared all of them in just 18 mins. Thank you !
Sir you are awesome. We are left without any doubts after watching your videos. Even if a doubt arises, the next moment you talk about that doubt. It's like you can read the mind of students.
Drift current is not only because of minority charge carriers.Drift current is electric current due to the motion of charge carriers under the influence of an external electric field while diffusion current is electric current due to the diffusion of carriers leading to a change in carrier concentration
Sir In video You told that the negative charge will repel the eletrons and don't let them to come in p side but the +ve ion layer on P side should also attract the eletrons ( as there is concentration difference ) and No longer remains Uncovered
the statement shown at the 04:35 seconds is wrong which should state as. " A RECTIFIER CONSTITUTES OF A PN JUNCTION " instead of ' a pn junction constitutes of a rectifire'
Hi Neso Academy, Thanks for such interesting and informative video lectures. I have a question: "Where do we the minority charge carriers? And do we always get 1 minority charge carrier along with 1 majority carrier from a particular atom?" Thank you.
Sir according to theory discussed....the drift current flows after the diffusion stops ...so there will be some time difference between drift and diffusion current so why we are taking them equal??
Ofcourse there should be a time difference till the depletion layer is achieved.Steady state is achieved once the depletion layer is formed and actually there is negligible flow of majority charge carriers and so is the case with minority charge cariers.In practicality the drift current is very less so we take it equal to the duffusion current.
Hole is a place where an electron coul be bound, but there is nothing ) So when free electron and hole meet each other, there is going to be no hole and a bound electron.
Koduru Sindhu actually hole is not moving in the semiconductor....hole is a relativistic concept...... only electrons are moving...and vacant position of electron is called hole.... relatively holes are moving not actually.....in reality only electrons are moving
Will you make a video about Fabrication methods of PN junction sir??... Please, I am really understanding the topic to the fullest from your lectures. So, was asking this favour sir!!!! :(
If we keep voltmeter there exits another potential difference which is opposite to the existed ones and hence both get cancelled so we can't measure the built in potential.
We couldn't measure this built in potential because there exist a counter potential(at terminals) which cancells with the built in potential (to satisfy the law of conservation of energy )
I looked into this myself. If the potential were externally measurable, you could derive infinite free energy from them. You could just connect a wire and have current flow with no battery, since you have a potential, current would flow. But that violates conservation of energy. So the metal contacts cancel out this potential. Look up ohmic contacts and metal-semconductor junctions for more information.
because a equilibrium state occur. Drift current is the opposite of diffusion current as we know drift current flow due to electric field and diffusion current flow due to the difference in concentration of majority carriers. Now steady states means no current will flow that means the two opposite current i,e drift current and diffusion current are equal and this state is called steady state or equilibrium state.
Arin Saha When the concentration of Majority Charge carrier is not equal to Minority charge carrier than how drift current can be equal to diffusion current. Your explanation is not correct.
i don't understand one thing in this video that is u already told that depletion layer does not contain any flow of charge but minority carriers are giving drift current
thank u sir making these vedios,sir I have a question that is- when barrier potential formed then diffusion current will be zero then how in stade state condition diffusion current =drift current also tell how we get drift current after formation of barrier potential.plz clear my doubts
Can You explain how the immobile electrons surface out so that depletion region formed, Similarly how the drift current obtained if the depletion region consists of only immobile electrons....?
Dear Neso academy, i have a doubt , will you clear it for me? Diffusion layer: Absence of free carriers but immobile Donor and acceptor atoms will be there. The free carriers hole and electron will recombine. While recombination, what happens ? what happens when hole and electron recombines? Do they cancel out ? if so where will their masses go? ( You said mass of hole > mass electron in previous lecture). Recombination result please explain.
How do electrons and holes combine? If an electron goes to a hole, it creates a hole in its previous position. How can there be no electrons or holes in the depletion region?
Sir !! In the lecture you told that drift current is equal to diffusion current , can you please elaborate it ? I am not able to understand that thing .
Thanks alot bro! but kindly explain the point that Whole is equivalent to positive charge ? thts y it repels the whole and similarly the negative ions repel electrons when depletion region is formed.If it is so than why there is diffusion current on start ?
Do you have planned to make more advanced content, such as Embedded system design or DMA, Interrupts, Memory Shadowing, Indirect Addressing and work maybe design with CPUs?
Well who cares about paying attention to online classes when this guy here teaches soo well and in short videos.... I definitely love this...
that's a flawed attitude
@@AryanSingh-eq2jv ok
This is not a guy, you're a guy. Now he, he's a MAN
From ALGERIA thinks sir, your video is the best in youtube .
The only channel that doesnt say
'LIKE SHARE AND SUBSCRIBE'☺
In the first semester I followed circuit analysis videos in this channel after missing the lectures in school and thanks to this channel I scored an A grade
And this second semester I hope I’ll have score in analog electronics as well as that of circuit analysis
Million thanks NESO ACADEMY 🙏
Hello, I'm here to tell you your videos really helped, I did my final exam well I almost thought I would either fail or pass on a border mark but scored decently. THANK YOUUUU
Hii dii... May I know what degree you're doing ?? I chose a course that I had no idea about and now I'm finding it all so difficult 🙂
@@222allmywishescometrue I was an Electronics and Communication engineering student. Don't panic about the course you have taken up, in my experience, trying to learn something from the subject for no reason, using help of such channels has helped me. Enjoy learning as you never know if you'd get the opportunity again. Wishing you the best 😊💜
@@avikadow I took bsc Instrumentation from DU... without knowing anything about the course and now it sucks😭
@@222allmywishescometrue Ouchh.. must be difficult. Do take help from any helpful faculty tho, your efforts would definitely show if you're consistent. The fact that you're even here shows you're working in some direction. All the very best to you!!
@@avikadow Thank youuu🥺❤❤
Sir , seriously I am saying that...it is the best video on pn junction in RUclips...I have many questions on it so see almost other's channel video....but it's best because it give me every question answer...but sir if you explain more on drift current as like diffusion current..it will superb...thnx again
yes sir
it is true
@@grandhivamsi9710 I refer one more that's Khan academy pn junction video...check this
Discussing electron and hole movement is like describing a picture and it's mirror image at the same time. A complete understanding of P-N junction theory can be done with electron flow alone. Dr. Shockley invented the idea of "holes" because it greatly simplified his math. But it is unnecessarily confusing and .adds nothing but extra work to the physical understanding/
I totally agree
welcome all the people who didn't pay attention in class xD
Welcome to you :)
Kyunki teacher chutiya Hota hai jinhe Sirf month ending k time pe Milne wale salary se matlab hai
atoms can't be moved.they are in circle+minus or hole
yo waddup my g
This is the best comment so far.
00:06 Introduction to semiconductor diodes and formation of PN Junction diode
02:39 Biasing of PN Junction Diode
04:52 Combining p-type and n-type semiconductors creates a junction with majority charge carriers as holes and electrons.
06:51 Concentration gradient drives movement of charge carriers
09:02 Depletion region is formed in PN Junction diode due to uncovered immobile ions.
11:28 Understanding majority and minority charge carriers in a PN junction diode
14:15 Depletion region width is fixed due to barrier potential
16:08 Drift current is due to minority charge carriers.
Absolutely beautiful explanation of pn junction diode. I have studied it earlier many times, always had some doubts, but you cleared all of them in just 18 mins.
Thank you !
Sir you are awesome. We are left without any doubts after watching your videos. Even if a doubt arises, the next moment you talk about that doubt. It's like you can read the mind of students.
you are exceptionally brilliant and knowledgeable sir!!!
NITian and IITian Attendance here❤
❤
😅
Jntuian😂
From iit Jammu😅
PInky nagar my friend told me about this .And what I have seen till this comment is very nice .Thanku
Drift current is not only because of minority charge carriers.Drift current is electric current due to the motion of charge carriers under the influence of an external electric field while diffusion current is electric current due to the diffusion of carriers leading to a change in carrier concentration
Exactly
Awesome lecture! Everything is crystal clear now
in fact u did the best explanation
continue helping us . God bless u
Thank you so much for explaining so deeply ❤️
Thanku sir ur leactures are nice u are one of the my best guide in subject one life saver ur lectures
After sleeping in class.. I'm here
My saviour for tomorrow's sem final _/\_
same here..
But now
Thank you very much....It is very helpfull.Bless the lecturer in the vdo and the one for uploading it
Thank you once again.
I reading this for my CAT today ❤
Sir u solved my class 12 problem which is even not solved by IIT professor in btech 1st year.
Thank u very much sir.
Thankyou so much sugeeth sir and neso academy
great teacher 🙏👏👏
Big thanks from Hungary!
best way to learn a basic ti high concept thanks sir .......
Thanks... You r always there to save the day 🔥
Sir In video You told that the negative charge will repel the eletrons and don't let them to come in p side but the +ve ion layer on P side should also attract the eletrons ( as there is concentration difference ) and No longer remains Uncovered
Hi , there is no +ve ion layer on P side.
I think it may also be due to the electric field force repelling them. So overall no movement takes place
At 16:20
In depletion region why there are electron and holes present
As it is depletion layer there should be no charge carriers
So why they present
the statement shown at the
04:35 seconds is wrong which should state as. " A RECTIFIER CONSTITUTES OF A PN JUNCTION " instead of ' a pn junction constitutes of a rectifire'
Very well explained sir.. Many thanks !!!
let me give it a lot of attention maybe i may achieve more from these videos
Thanku sir your all videos are best👌👌👌
Thank you so much ,Excellent explanation!!!!!
Good work neso academy good explanation no bullshit
Best theoretical explanation 👍👍👍👌
Excellently delivered
YOUR VOICE IS VERY PERSUASIVE
u are amazing at teaching.
seriously amazing......
Best explanation 👍
Hi Neso Academy,
Thanks for such interesting and informative video lectures. I have a question: "Where do we the minority charge carriers? And do we always get 1 minority charge carrier along with 1 majority carrier from a particular atom?"
Thank you.
thank you very much neso academy... please keep making videos
Watched it at 2x speed. Understood better!
Sir according to theory discussed....the drift current flows after the diffusion stops ...so there will be some time difference between drift and diffusion current so why we are taking them equal??
Ofcourse there should be a time difference till the depletion layer is achieved.Steady state is achieved once the depletion layer is formed and actually there is negligible flow of majority charge carriers and so is the case with minority charge cariers.In practicality the drift current is very less so we take it equal to the duffusion current.
Due to some technical issue
😅😅
bro u own physics
Thank you for making these videos : ) Could you explain what it means for a hole and an electron to recombine?
Hole is a place where an electron coul be bound, but there is nothing ) So when free electron and hole meet each other, there is going to be no hole and a bound electron.
Yah
Hole is a vacant space created by the valence electron (when it moves from its own place) ,but how a hole is moving from one place to another
Koduru Sindhu actually hole is not moving in the semiconductor....hole is a relativistic concept...... only electrons are moving...and vacant position of electron is called hole.... relatively holes are moving not actually.....in reality only electrons are moving
thank u very much to giving me a better understanding
Excellent job , Thanks a lot
Excellent sir🔥
good explanation..
tq sir😊
Sir can you pls make a video on explanation on energy bands of n and p type semiconductors !!
Thank u sir i got full clarity in this subject. But kindly let me know whether u have lectures on network theory
Do you see a search bar on top of the browser? I think it should help you :p
Doubt how minority charge carrier is responsible for drift current as e- is moving from N side to N side only which is majority charge carrier
Will you make a video about Fabrication methods of PN junction sir??... Please, I am really understanding the topic to the fullest from your lectures. So, was asking this favour sir!!!! :(
Top study sir .....
IES INterview question why we can't able to measure the built-in potential of the p-n junction by using a voltmeter.?
What's the answer brother ??
@@sobankumar4927 barrier potential is inside the material, how can you measure it?
If we keep voltmeter there exits another potential difference which is opposite to the existed ones and hence both get cancelled so we can't measure the built in potential.
We couldn't measure this built in potential because there exist a counter potential(at terminals) which cancells with the built in potential (to satisfy the law of conservation of energy )
I looked into this myself. If the potential were externally measurable, you could derive infinite free energy from them. You could just connect a wire and have current flow with no battery, since you have a potential, current would flow. But that violates conservation of energy. So the metal contacts cancel out this potential. Look up ohmic contacts and metal-semconductor junctions for more information.
Please why are the donor ions in the n type semiconductor positive?
where as the impurity atom used is phosphorus and its negatively charged
you are amazing Sir.
Thanks a million ✌️
super and nice explanation
Thank you so much!
Nice but
1.what is steady state?
2.why diffusion current=drift current at steady state?
because a equilibrium state occur. Drift current is the opposite of diffusion current as we know drift current flow due to electric field and diffusion current flow due to the difference in concentration of majority carriers. Now steady states means no current will flow that means the two opposite current i,e drift current and diffusion current are equal and this state is called steady state or equilibrium state.
Arin Saha
When the concentration of Majority Charge carrier is not equal to Minority charge carrier than how drift current can be equal to diffusion current. Your explanation is not correct.
Please what’s the breakdown voltage of a pn junction diode and how it’s calculated ?
i don't understand one thing in this video that is u already told that depletion layer does not contain any flow of charge but minority carriers are giving drift current
Thank You So Much
at 6:05 you said positive acceptor ions...🙄
thank u sir making these vedios,sir I have a question that is- when barrier potential formed then diffusion current will be zero then how in stade state condition diffusion current =drift current also tell how we get drift current after formation of barrier potential.plz clear my doubts
In depletion region the electron is recombined with hole so there ion is converted into atom. But how there is still ions are present?
All the not recombine some will stay alown
You are the best
so helpful!
Biasing is application of voltage accross 2 terminal.
But is it biasing with respect to DC voltage or AC voltage?
Thank you for the video by the way.
DC in this case
Can You explain how the immobile electrons surface out so that depletion region formed, Similarly how the drift current obtained if the depletion region consists of only immobile electrons....?
electrons are mobile, the ions are immobile,
thankyou so much sir .
Dear Neso academy, i have a doubt , will you clear it for me?
Diffusion layer: Absence of free carriers but immobile Donor and acceptor atoms will be there. The free carriers hole and electron will recombine. While recombination, what happens ? what happens when hole and electron recombines? Do they cancel out ? if so where will their masses go? ( You said mass of hole > mass electron in previous lecture). Recombination result please explain.
How do electrons and holes combine? If an electron goes to a hole, it creates a hole in its previous position. How can there be no electrons or holes in the depletion region?
Nice sir.
why donor atoms aren't negative ?please anyone explain
Sir !! In the lecture you told that drift current is equal to diffusion current , can you please elaborate it ? I am not able to understand that thing .
Yeh. They are the majority carriers and other one is minority, how come both produce same current ?
Hey can you draw out the energy diagrams for these diodes please?
Can you explain drift current please 😊
Who have exams after lockdown and listening the physics here hit a like
At the depletion layer possitive layer repel the holes but it attracts electrons is possible,so is it depletion region increases?
what is meant by uncovered charges
Thanks alot bro! but kindly explain the point that Whole is equivalent to positive charge ? thts y it repels the whole and similarly the negative ions repel electrons when depletion region is formed.If it is so than why there is diffusion current on start ?
Hole*
How can the hole move through the depletion layer. I think only the electrons will move because they are mobile.
Sir P-N junction diode picture can't understand , p type negative charge and n type positive charge why?
Thanks from Bangladesh. Btw sound quality should be improved.
I think p type are positevely charged carriers u mentioned n type y sir
Actually, holes can't move they just take an electron from neighboring atom cause another hole to be formed.
Hi all from the class 😎
May I know from which book you are referring, so that I can go through it once
thank you so much
can holes move? 7:20
Sir loss in electron and formation of holes are different
Do you have planned to make more advanced content, such as Embedded system design or DMA, Interrupts, Memory Shadowing, Indirect Addressing and work maybe design with CPUs?
Can it is also for b tech first year electronics
Sir can you please start the series on 8085 microprocessor. Please Sir.
so desperate :p