Minority charge carriers in extrinsic semiconductors | Class 12 (India) | Physics | Khan Academy

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In this video, we will explore what happens to minority charge carriers in an extrinsic (doped) semiconductor.
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Class 12 Semiconductors: We cannot imagine our life without computers today. But what makes a computer tick? What's making this technology grow at such an exponential rate? It's all due to semiconductors. As unbelievable as that might sound, altering the properties of semiconductors allows us to build these computers. In this topic, we will explore the world of semiconductors. It's a journey from what semiconductors are all the way to creating building blocks of these computers.
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Created by Mahesh Shenoy

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16 окт 2024

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Комментарии : 61

@hustling_dodo1354 2 года назад

I personally feel he explains much better than other RU-vid channels. Just a personal opinion...

@frictyfranq321 2 года назад

I would've regretted in my future if I hadn't seen these videos right now. It feels so plausible to do everything that he says. I am grateful for all of your work. Thanks a lot.

@tanishqgupta3175 3 года назад

Not only is the content of the video excellent but your excitement makes me excited for this subject. Thanks Mahesh.

@arijitsingh1096 6 месяцев назад

just amazing... i am just deeply acknowledged by your knowledge....

@Funchoz_learn 4 года назад

Please upload other chapters also .... specially of modern physics .... Just hats off

@zGirija 6 лет назад

Great content man. Hope this channel gets popular soon. Really helpful.

@themistoklisk82 3 года назад

Although i didn't come here for the math, this is a video i have already watched 3-4times. Great work, i love your enthusiasm!

@sheneselalla3910 5 лет назад

Your videos are like the God of Semiconductors. You cover all the good stuff from my course in Optoelectronics, your explanations are on point. Very easy to understand. I would recommend your videos any day.

@tejasvnidhir511 4 года назад

THIS LITERALLY SAVED MY LIFE, THANK YOU!!!

@kotaslife667 4 года назад

How sweet physics . Excellent , fabulous, uncomparable. Thanks u a lot sir .

@practicalcentre1840 3 года назад

Please conduct some online classes so we can ask some questions for clarity of our confusion.

@osamazahid715 6 лет назад

You explain it in a brilliant way.

@osamazahid715 6 лет назад

such a great teacher!!!

@kotaslife667 4 года назад

Sir just questions come in your mind similarly many question arises in my mind also but i donot have enough knowledgeble teacher to answer my questions .

@vaibhavgandhi7001 5 лет назад

Best content sir Really good Why so much low views ? I can't understand it's great

@ThuyTruong-tw7yy 3 года назад

wow this is the best explanation. You are just soooo smart and wonderful. Thank you so muchhh for this vid

@kunaldas879 6 лет назад

Thanks for this playlist

@preethipara8028 5 лет назад

Excellent analysis👏

@flosset6070 3 года назад

Your videos are helping me a lot. Tysm

@gabriel-oh9ck 2 года назад

heavy underrated channel

@letsgetit7075 4 года назад

I have a doubt , electrons and holes both contribute towards conduction. Then, if electrons are increased by10^6 times and holes are decreased by 10^6 times how is the conductivity improved?

@joshuantw 4 года назад

conductivity increases because number of charge carriers has increased from 2(10^10) to (10^16)+(10^4)≈ 10^16 hence number of charge carriers has increased about a million times.

@letsgetit7075 4 года назад

@@joshuantw Oh! yes....now I understand, don't know what was I thinking at that moment😅 Well, thanks

@kotaslife667 4 года назад

Same doubt come in my mind also

@catharperfect7036 Год назад

@@kotaslife667 The important thing to remember is that the doping atoms are immobile. They get a charge, but they don't actually move. However n-type materials will now have lots of moving electrons, and p-type materials lots of moving holes. Holes will move in the same direction of an applied electric fields, electrons in opposite direction. We need to put these two types of material together (to create NP junctions, which he will talk about later) to get the actual effect of unidirectional electrical property, and so then ability to use the system as a switch (we can then even create digital logic with this).

@kamlarautela551 6 месяцев назад

I really wanna see u sir 😮how awsm are u i feel as a friend

@lewtube6436 Год назад

The issue I have is the f(T) being the same for intrinsic and extrinsic scenarios. This quantity only depends on temperature because of the way it is written. But it must also depend on the element. I would have thought if the Si is doped with something, like P, then rate of generation would change. So, is it because the doping rate is only 1 per million that f(T) can be considered the same?

@lmraihanhamid2706 3 года назад

That's helpful

@harshavardhanhajeri1753 3 года назад

better than lot of JEE channels on youtube

@catharperfect7036 Год назад

Cheers for the vid my fellow hive puppy. Keep shaggin.

@renukapandit8257 5 лет назад

Knowledge oozes

@ericblack1127 4 месяца назад

Well said.

@petromyzontida. 3 года назад

his video end like teacher is teaching in classroom and lights out .-. Great lecture though sir

@_srashtigupta_ 2 года назад

Hello sir!!! As you said that temperature is the same so generation is the same in intrinsic & extrinsic semiconductors. But both the materials are different ryt....so how can generation be same, why generation =k10^(20) for extrinsic also?

@shantidevi4503 Год назад

Sir Can you please answer the question that if the number of holes are decreasing by recombination then why isn't the no. of free electrons decreasing by the same number as in recombination electron falls into holes to fill them as explained by you in previous videos It will bea great help if you could clear this

@CGuevara00 3 года назад

¡Thank you!

@habib9266 Год назад

Thank you

@ambikathakur8794 6 лет назад

Thanks sir

@sivarishi9639 6 лет назад

Awesome

@navneethsajith6984 2 года назад

superb

@260eeeprasuna2 4 года назад

Very very good

@komalhayat417 5 лет назад

greatttttttttttttttttttttttt..... I have a question: why the number of holes decreases I mean the reason!

@anjaleenarain979 4 года назад

Recombination

@RobbyBoy167 2 года назад

yo this is class 12 in india? damn bro!

@zaeemAtif 4 года назад

Nh=10 power 6 by 1% P mind blown!!!!!!

@ricogarcia9341 2 года назад

I have one thing to ask, isn't it will not obey Pauli's Exclusion principle for the 5th electron level/ donor level since all addition electrons will be on that level once added to the crystal?

@catharperfect7036 Год назад

You need to go back to the start of the series. Band theory means there's actually many millions (as many as the number of atoms) of different (but close) energy levels making up both the valency band and conduction band. It's a totally different model used with solids.

@RUDRARAKESHKUMARGOHIL 2 года назад

Sir, you had mentioned in previous video that no two electrons have same energy level,then how all phosphorus Valence electron occupy same energy sir ?

@purushothaman5484 2 года назад

They don't occupy the same energy level. I know that A straight line is drawn in the video but what that means is a very small band of combined energy levels of phosphorus atoms which is approximately equal to a line but not a single line

@parkerkooima9501 Год назад

"It's like a million million, I don't even know what to call that" How bout a trillion 😂😂😂

@joelvarela7785 5 лет назад

Gracias saludos

@rishabhranjan9168 3 года назад

Jee Mains👽🥀

@darshantl18 3 года назад

Kids read the books Legends watch Khan academy videos

@solaaar3 4 года назад

if si has 4 electrons in its valence band, how the number of silicon atoms is more than electron number??? it doesn"t make sense for me.

@KhanAcademyIndiaEnglish 4 года назад

The electron number here are the conduction band electrons (not valence band electrons)

@catharperfect7036 Год назад

When talking about electrical properties, we only really care about the number of FREE electrons (they along w/ holes in the case of semiconductors are going to be what carries the charge)