Doping and intrinsic carrier concentration

[@DeepakPhysics]

Nice explaination sir Thank u so much

[@pavankumarenugula5637]

Suuuuper sir we need much more topics by you😍

[@saikrishnaprasad5204]

Nailed it bro, crystal clear explanation 👏👏👌👌

[@impxlseofficial]

Bro???🤣

[@kprathamprabhu9626]

Dude he is a professor at IISc!

[@abhijitghosh6242]

Bro???😡 Respect him...he is professor at IISc Bangalore

[@amitkumar-sh2lk]

@@abhijitghosh6242 but iisc prof want to call them by their name , so if he says bro then faculty will be happy

[@himanshusalunkhe88]

Bro Kya Bol rha

[@farzanasnigdha7048]

Thanks a lot sir

[@indrashispowali-hf5tk]

amazing

[@subhrajyotighosh6714]

Nice explanation... 👍...It's indeed a great help...

[@roniadhikari2724]

👌👌👌👌

[@deepstudywithamitkumar4124]

Great explanation clear all dought

[@Neeraj-is1jt]

At 19:35 how can a electron exist in a forbidden energy band gap (i.e. in a donor energy level)?

[@uditbhattacharya4476]

Just FATAFATI

[@anishsinghrajput8981]

sir plz clear the value of effective mass of holes ..and compare with effective v mass of electron..

[@Neeraj-is1jt]

Tell me if u get the answer

[@sobiaqayoom5852]

Sir,if Fermi dirac function can b approximated to exponential term for moderate doping than how can we use exponential term in intrinsic carrier concentration equation?

[@ManideepSegu]

For intrinsic carrier, Fermi Energy is in the mid, so obviously EC - EF >= 3kT and same with EF - EV. So the same approximation of Fermi integral applies for intrinsic carrier as well. Hope this clarifies.

[@venkteshsrn6142]

@29:43 Ef's got cancelled so no fermi stuff is involved

[@prithwishdas2614]

@@ManideepSegu thank you!!! that actually clarifies it

[@AnimationsJungle]

what will happen if doping is high....? what will happen to the equation ? please explain thank you

[@amitkumar-sh2lk]

next lecture it is given

[@anishsinghrajput8981]

respected sir i have a dout ,,it EF=EV then what is the type of material..same for Ef=Ec ,.thank you

[@mohdmonish3566]

@Anish singh rajput, if EF=Ev, then it will be an insulater, if Ef=Ec it will be a metal( conductor)

[@shivkumar-mx6pb]

@@mohdmonish3566 It will behave like a metal or inverse, not exactly metal, or we can say highly doped semiconductor till EF=EC, after that, they call it a degenerated semiconductor.

[@josephalias5671]

good work

[@louerleseigneur4532]

Awesome

[@agentwalker7045]

29:29 sir how that formula is applicable to intrinsic semiconductor ???? It was derived when there's moderate doping but in intrinsic semiconductor there's no doping .....then how can it be applied here ?????

[@prithwishdas2614]

I have the exact same question can anyone please clarify

[@vishalgour3847]

Even I have the exact same question !!! @nptel-indianinstituteofsci8064 Can you please clarify

[@notnemeziz]

its because even in case of no doping the condition given ie Ec-Ef>=3KbT is still satisfied.....so actually it was just not applicable to high doping, anything else works

[@malothsanthosh2032]

sir please share the ppts or pdf

[@ratneshgupta2770]

sir has said Ec-Ef>3kt where k is boltzma constant but sir has said Ef-Ec ad i the f(E) eq also it is Ef-Ec so I am confused it is Ef-Ec or Ec-Ef anyone knows reply

[@mohit_0435]

It is Ef-Ec.

[@gayathris2196]

Sir please say reference book for lectures

[@himanshusalunkhe88]

Street man and Banerjee