Hi, i'm a student at Bosphorus University Istanbul. Your lectures on semiconductors are 1000x better than our incompetent lecturer could you consider lecturing at my university? Thank you😂 The way he is conveying the topic is adorable.
Hi, i'm a student at imperial college london. Your lectures on semiconductors are 1000x better than our incompetent lecturer could you consider lecturing at my university? Thank you
whenever someone told you it is a soln of ... in qm, assume it they have told you it is a soln of schrodinger eqn . Q1:most of my frnds asking me why these carriers are staying near the bottom of the conduction band? Ans:As all electrons try to get least amount of energy as possible to become more stable thats why they occupy the bottom zone of band and as they are small in number so they can easily conjusted themselves in the lower bottom region of conduction band and we can do a parabolic thinking.and at k=0 the p is zero hence the KE =0
I'm so happy we don't have to remember these derivations and stuff Anyways nice lectures, funny to see random class shots and see everyone get camera conscious
The 'k' factor seems similar to the propagation constant in a rectangular waveguide at resonance. The movement of electrons in a unit crystal cell seems similar to the EM wave propagation in a rectangular wave guide in TE mode.
Thank you so much for this wonderful explanation. I have one doubt that When electron is inside the semiconductor, it will move under the influence of external or internal field?
Made me to recollect those beautiful memories of Tom and Jerry Those lines I have mentioned in the top are just after watching few seconds of intro...... But the lecture was awesome..... He was teaching a topic that is completely out of world for me...... But even for a second also I never felt that I'm not understanding and its going out of my mind..... May be this is IIT.......
Prof. Shenoy says that m, n and p cannot be 0. Is that is the case, how can k=0 (gamma point) ever be realized because for gamma point all three k_x, k_y and k_z must be zero, i.e. essentially m, p and q must be zero? Can someone help! Thanks!
Bro m, p, q can't be simultaneously zero, at least one should be non zero, if this happens then electron will be static inside the crystal which is absurd.
Do you agree that there should be integral number of nodes in the standing wave condition? The simple explanation is that when the wave travels from one end to the other and comes back it covers a total angular distance of 2Npi. k.r is the phase, roughly speaking, it is the angular distance covered by the wave in one trip.
The intro is like we going to watch a video of TOM & JERRY
This is so funny
,🤣🤣🤣🤣
😂😂
😂😂
Mexicano by luis cobos Royal Philharmonic
Hi, i'm a student at Bosphorus University Istanbul. Your lectures on semiconductors are 1000x better than our incompetent lecturer could you consider lecturing at my university? Thank you😂
The way he is conveying the topic is adorable.
prof. Shenoy is still teaching(Optical Electronics) at iit Delhi & We had a quiz last week😃.
This professor is Brilliant and very calm!! I love him and his style!!
He definitely is an awesome teacher!
This is one of the best lectures i have seen!
from venezuela, exelente edition..wonderfull teachers.....no doubts, the next first super power INDIA....
Hi, i'm a student at imperial college london. Your lectures on semiconductors are 1000x better than our incompetent lecturer could you consider lecturing at my university? Thank you
Lolz bro aint easy to just go to London and join as a prof in a college..... Moreover he is more needed in India😁
Man even icl have incompetent teachers wow
Old is gold❤
Excellent ,great respect for you from Nepal..
K TAKES BILLION VALUES AND YOUR LECTURE 100S OF BILLIONS........... ENLIGHTED SIR THANKS
Highly informative lecture.
Amazing lecture
Thank you soo much sir
whenever someone told you it is a soln of ... in qm, assume it they have told you it is a soln of schrodinger eqn .
Q1:most of my frnds asking me why these carriers are staying near the bottom of the conduction band?
Ans:As all electrons try to get least amount of energy as possible to become more stable thats why they occupy the bottom zone of band and as they are small in number so they can easily conjusted themselves in the lower bottom region of conduction band and we can do a parabolic thinking.and at k=0 the p is zero hence the KE =0
now i understand the motivation behind density of states
Maybe Kx, Ky & Kz are not independent integral multiples if we are dealing with not a plane wave but a spherical wave.
Surperb lec Sir!!!
I'm so happy we don't have to remember these derivations and stuff
Anyways nice lectures, funny to see random class shots and see everyone get camera conscious
The 'k' factor seems similar to the propagation constant in a rectangular waveguide at resonance. The movement of electrons in a unit crystal cell seems similar to the EM wave propagation in a rectangular wave guide in TE mode.
proud to be an indian
Wonderful lecturer 🙏
Why the lecture number is missing in title. i think TH-cam is updated
I wish that I had Prof. Shenoy as my faculty in 2004 while I studied this subject.
MrMarshallAC I don't
really amazing sir
are Kx, Ky & Kz still independent integral multiples if we are dealing with a spherical wave??
Spherical wave or spherical shell
Thank you so much for this wonderful explanation. I have one doubt that When electron is inside the semiconductor, it will move under the influence of external or internal field?
they move under extenrnal force , only when yu consider mass of electron as effective mass ,
we use effective mass to isolate electron from internal environment (ie . internal force )
how no. of e in VB is same order as no. of atoms in VB. (though a single atom contain minimum two e)
13:28 lol
btw, amazing lecture......
Made me to recollect those beautiful memories of Tom and Jerry
Those lines I have mentioned in the top are just after watching few seconds of intro...... But the lecture was awesome..... He was teaching a topic that is completely out of world for me...... But even for a second also I never felt that I'm not understanding and its going out of my mind..... May be this is IIT.......
sir yeh 3d me h ya koi or dimension me
why they show us the faces of audience in between the lecture
Good lecture. However, there is a mistake: kr is NOT always =Npi. This only holds for points r at the boundary.
No it's always true as your wave function should vanish beyond the lattice
How is this discussion relevant to designing solar cells?
So at the origin of E K diagram k is not zero? Here k just have minimum value 41:21 ?
If effective mass is inversely proportional to mobility then how come the electron mobility of Si is greater than the hole mobility? 15:23
I have the same doubt..did you find an answer..please reply..
@@t_a7923 hole is consider to be slower than electron as movement of holes is based on release and trap mechanism unlike electrons
@@akanchhakumari5666 thankyou
It will also depend on relaxation time of carrier
Prof. Shenoy says that m, n and p cannot be 0. Is that is the case, how can k=0 (gamma point) ever be realized because for gamma point all three k_x, k_y and k_z must be zero, i.e. essentially m, p and q must be zero?
Can someone help! Thanks!
Yes ,,,,m,p &q are intergers & can take zero value , its just little mistake did by great professor
at gamma point k = 0 not because m, n & p = 0 but because wavelength tends to zero
Bro m, p, q can't be simultaneously zero, at least one should be non zero, if this happens then electron will be static inside the crystal which is absurd.
00:20
You cannot show the value of k by movement of electron as k is associated with wave nature of electron in qm @39:00
any one let me know ...what is meant by carrierr per cc? cc stand per?
cc is cm cube
what is meant by cc?
Cubic centimetre
I can't understand why 2k.r=N.2pi pls someone help me.
me too
Do you agree that there should be integral number of nodes in the standing wave condition?
The simple explanation is that when the wave travels from one end to the other and comes back it covers a total angular distance of 2Npi. k.r is the phase, roughly speaking, it is the angular distance covered by the wave in one trip.
24:34 :D