00:01 Understanding electrical properties through energy band structure 01:02 Conductors have overlapping energy bands, creating a single giant energy band. 02:03 Conductors have free-moving electrons due to energy continuum 03:01 Band gap determines insulator behavior 04:06 Insulators have forbidden energy levels that make it difficult for electrons to get excited. 05:09 Semiconductors have an extremely tiny band gap, leading to higher electron excitation at room temperature. 06:10 Semiconductors have a small band gap, allowing some electrons to become free. 07:08 Conduction bands and valency bands explained
These videos have made learning so much fun!!!... A great way of teaching...Can we have more videos for the 12th standard courses? it'll be really appreciable.
Is it necessary to state 0 Kelvin while defining the valence band? It is confusing because valence band has it's definite energy, The temperature is the indicative of the energy of the electrons. At 298 K (room temperature), the energy of the valence band will not change, but the electrons will attain energy to jump to the conduction band.
Rituraj Borah What I *think* could be an answer to your question is that when temperature isn’t 0 Kelvin then some of the electrons in the valance band acquires thermal energy (equivalent to kT where k is the Boltzmann constant and T in temperature in kelvin) and leaves the valance band in order to go to conduction band. Now as the valance band isn’t fully filled (an electron just went to conduction band), it technically shouldn’t be called as a valance band as valance band is defined to be the highest energy band that’s *filled*. When defining valance band, we shouldn’t let electrons acquire any energy from external sources and this is possible at 0 K.
how can conduction band and the valence bands overlap? doesn't it violate pauli's principle ... and how does this conduction band helps electron to hop around from from one atom to atom?
Sir, could u tell which shells come in the conduction band?.... I'm thinking as a series of valence shells form the valence band (3s shells of Na solid) then a series of higher unfilled shells form the conduction band (like 3p, 4s shells in Na solid)...plz do crt if I'm wrong.
MOT isnt it a mathematical manipulation? so how come that manipulation is able to explain the conduction in metals (i mean wasnt it manipulated so that it explains paulis rule as you said in previous video)
these energy bands you are talking about. Can you describe them as "electron shells" ? ---> Directly translated from swedish ;) ... My teachers in chemistry have always talked about these shells where you have a fixed amount of electrons in each and every one of them. And I believe the numbers of electrons are 2-8-8-2 from the inner shell to the outer one. Just a side note. If I´m correct, then a typical insulator would have completely filled electron shells i.e "locked electrons".
No. What you are referring to are discrete energy levels of a single atom system. (These are the shells). However when multiple atoms come close to each other, these discrete energy levels convert to energy bands. The video is try to explain what these bands are. So they cannot be thought of as energy shells. (That is only applicable for isolated atoms)
I got the same doubt as my book have no reference like this is these same thing you studied in molecular orbital theory im chemistry. If u Still cant understand : ruclips.net/video/3npADYVtQOM/видео.html
ok but but where is the forbidden gap at 2:28? I'm lost: following your logic, I don't see why at 3:50 the electrons could not move freely ("as student in a classroom") until the blue line. What did I missed?
Ok I got (only a part of) it, I missed 1:20 : the first and second energy bands are overlapping. Feedback: I would not have removed them from you animation, it's harder to understand without it. But even with it, the drawing would have remain confusing since there is no difference between the way you draw the conductor and the insulator: the next blue line/energy band is missing on the insulator drawing right? Edit I finally got it: *the yellow bar show the first band, the blue one the second*. There is a huge gap btw them on insulator, so they can't jump (I watched it too quickly, sorry).
Why electron need to have different energy level??? I never understand the language of google, book and teacher, I can only understand your explanation
because gravity has a tetrahedral geometry with one unpair electron .... which forms layers called Graphene (having a sheet of unpaired electrons above them ... making them conductors of electricity when potential is applied along the plane) such layers of graphene stack to form graphite and are the reason for its conductive nature whereas diamond is made of a network of carbon atoms and has no free electron, making it an insulator
There's a 3 ep series called "The Mystery of Matter". It explains how these fundamental things were discovered very beautifully! You can find it on RUclips as well😄
00:01 Understanding electrical properties through energy band structure
01:02 Conductors have overlapping energy bands, creating a single giant energy band.
02:03 Conductors have free-moving electrons due to energy continuum
03:01 Band gap determines insulator behavior
04:06 Insulators have forbidden energy levels that make it difficult for electrons to get excited.
05:09 Semiconductors have an extremely tiny band gap, leading to higher electron excitation at room temperature.
06:10 Semiconductors have a small band gap, allowing some electrons to become free.
07:08 Conduction bands and valency bands explained
I am gonna download the whole playlist, its a great source of learning!
I am downloading as I'm watching
@@ukashk1071same here in Africa 🌍😂😂😂😂
I'm a physics teacher and I really love your teaching style and I also use your technique I'm my teaching.
These videos have made learning so much fun!!!... A great way of teaching...Can we have more videos for the 12th standard courses? it'll be really appreciable.
like you saved my life my professor don't explain anything at all like we know all this before when i was born
lol samee
Thank you sir. The eloquence of your speech, the animation, your enthusiasm and overall your method of teaching is amazing. Thank you for helping us!
Guys I am student of pw but from this platform i understand a lot in simple ways. ❤️❤️
No ad is like a blessing ♥️
Thank you Khan Academy ❤️❤️😊
For teaching in English 👏👏😁
wow, wish we had teachers like this in school.
Great teaching skills
LOVE THIS,BRIEF AND COMPREHENSIVE!!!!!!!!!!!!!!
Is it necessary to state 0 Kelvin while defining the valence band? It is confusing because valence band has it's definite energy, The temperature is the indicative of the energy of the electrons. At 298 K (room temperature), the energy of the valence band will not change, but the electrons will attain energy to jump to the conduction band.
Rituraj Borah What I *think* could be an answer to your question is that when temperature isn’t 0 Kelvin then some of the electrons in the valance band acquires thermal energy (equivalent to kT where k is the Boltzmann constant and T in temperature in kelvin) and leaves the valance band in order to go to conduction band. Now as the valance band isn’t fully filled (an electron just went to conduction band), it technically shouldn’t be called as a valance band as valance band is defined to be the highest energy band that’s *filled*.
When defining valance band, we shouldn’t let electrons acquire any energy from external sources and this is possible at 0 K.
@@Extraordinary10s I think you are right!
This is amazing! Very easy to understand :)
I also used to get confused why band theory of semiconductors is only valid for solids not for Gases.
how can conduction band and the valence bands overlap? doesn't it violate pauli's principle ... and how does this conduction band helps electron to hop around from from one atom to atom?
Best video for this topic till now and as well as the video for the band theory is the best explanation till now for me
Which software do u use to make videos otherwise it's lit and awesome 🎉
What an explanation 🥹🥹
Why is the highest energy band (yellow line) at the same height/amount for all materials?
Absolutely great, thank you.
Hmmm...amazzzzzzzzzing explanation!!!!!
Sir, could u tell which shells come in the conduction band?.... I'm thinking as a series of valence shells form the valence band (3s shells of Na solid) then a series of higher unfilled shells form the conduction band (like 3p, 4s shells in Na solid)...plz do crt if I'm wrong.
Amazing. Thank you sir.
Nice teaching..... thanks a lot
MOT isnt it a mathematical manipulation? so how come that manipulation is able to explain the conduction in metals (i mean wasnt it manipulated so that it explains paulis rule as you said in previous video)
Good content.. Appreciable.
Great explanation
Thank you so much for this . Wonderful teaching . I had a doubt though about why the semiconductors have fully filled valence band?
these energy bands you are talking about. Can you describe them as "electron shells" ? ---> Directly translated from swedish ;) ... My teachers in chemistry have always talked about these shells where you have a fixed amount of electrons in each and every one of them. And I believe the numbers of electrons are 2-8-8-2 from the inner shell to the outer one.
Just a side note. If I´m correct, then a typical insulator would have completely filled electron shells i.e "locked electrons".
No.
What you are referring to are discrete energy levels of a single atom system. (These are the shells).
However when multiple atoms come close to each other, these discrete energy levels convert to energy bands. The video is try to explain what these bands are.
So they cannot be thought of as energy shells. (That is only applicable for isolated atoms)
I got the same doubt as my book have no reference like this is these same thing you studied in molecular orbital theory im chemistry.
If u Still cant understand : ruclips.net/video/3npADYVtQOM/видео.html
Is playlist enough for jee
Quality content!
Thank you!!!!
3:39 it's 6 eV
Very very usefull
Fantastic 🤩🤩💥
Sir can u tell how to get all your videos of PCM
What happens If valance shell of insulators and semiconductors is not completely filled with electrons ?
Awesome
ok but but where is the forbidden gap at 2:28? I'm lost: following your logic, I don't see why at 3:50 the electrons could not move freely ("as student in a classroom") until the blue line. What did I missed?
Ok I got (only a part of) it, I missed 1:20 : the first and second energy bands are overlapping.
Feedback: I would not have removed them from you animation, it's harder to understand without it.
But even with it, the drawing would have remain confusing since there is no difference between the way you draw the conductor and the insulator: the next blue line/energy band is missing on the insulator drawing right?
Edit I finally got it: *the yellow bar show the first band, the blue one the second*. There is a huge gap btw them on insulator, so they can't jump (I watched it too quickly, sorry).
@@ytrew9717 Thanks for the feedback, I am guessing you resolved your own doubt. Feel free to reply if you have more specific question :)
Great way to teach, Loved it!!
I love you!!!!!
The way you teach inspires me
Why electron need to have different energy level??? I never understand the language of google, book and teacher, I can only understand your explanation
U r 👍✌👌👌👏
Thanks
Sir, diamond and graphite are compressed form of carbon
Then why they show different nature
One is insulator and one is condutor
because gravity has a tetrahedral geometry with one unpair electron .... which forms layers called Graphene (having a sheet of unpaired electrons above them ... making them conductors of electricity when potential is applied along the plane) such layers of graphene stack to form graphite and are the reason for its conductive nature
whereas diamond is made of a network of carbon atoms and has no free electron, making it an insulator
What is Fermi level
What is the cnduction band called as at 0K? Does it exist at all?
Insulator.
Why is the valence band completely filled in insulators and semiconductors?
You got my sub, great explanations, simple and easy to follow
Sir ,In insulators there is a huge forbidden band however, charges get induced in it ,why???
thanks❤😭
Why insulator have a gap and conductor is not? It is because the energy level that use is 2 8 8?
❤️
First to like
Bro where conduction band comes frm
1:38 you mean hybridization?
are these videos helpful for neet???????
Me thinking same?
Damn right
When concepts become clear it's helpful for any exam you face
We can't see an atom, but how do we know all these how can we see them in practical
its all mathematics and prediction of quantum mechanics plus the experimental results
There's a 3 ep series called "The Mystery of Matter". It explains how these fundamental things were discovered very beautifully! You can find it on RUclips as well😄
681
fun
OK
Word?!?
Honestly Speaking everything is fine except the voice for me .
No deep explanation
Use text book
He wrote bank😂
OK😂
I can't believe this is in class 12
why this guy desperately tries to imitate Sal Khan . It doesn't work with such an accent
how can someone sound so annoying
Excellent teaching skills
Yeah