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LED - color & fabrication | Semiconductors | Physics | Khan Academy 

Khan Academy India - English
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Let's explore the fabrication considerations of making LEDs. We will also explore why LEDs are not made of silicon or germanium but of semiconductor compounds like GaAs, GaPh, GaN, GaAsPh, etc.
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
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Created by Mahesh Shenoy

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25 авг 2024

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Комментарии : 48   
@jemsncrystals
@jemsncrystals 3 года назад
*these type of channels beed tobcome on top like 10 million. Not somone playing videogames. This channel is sooooo underrated thankyou so much*
@shivambaghel7991
@shivambaghel7991 7 месяцев назад
Really explanation is too good I don't know why this channel is underrated thanks a lot ❤❤
@yashwantsaini6028
@yashwantsaini6028 Год назад
I am an electrical engineer. I can surely say that, this type of explanation i never seen. I knew the concepts but implementation..........
@williamfame4261
@williamfame4261 2 года назад
Very easy to understand, thanks for sharing this knowledge.
@08athakwaninandish16
@08athakwaninandish16 2 года назад
इतने अच्छे विवरण के लिए शुक्रिया!
@querysnthoughts1518
@querysnthoughts1518 5 месяцев назад
Thank you sir❤❤
@smartgamer4203
@smartgamer4203 2 года назад
Mind-blowing explanation sirr....
@gnanaprasuna8131
@gnanaprasuna8131 Месяц назад
Very well presented
@sfchannel3319
@sfchannel3319 Год назад
No words! Fantastic explanation!!
@dr.devdeganeshn1162
@dr.devdeganeshn1162 24 дня назад
Excellent
@ayushbhalerao9980
@ayushbhalerao9980 3 года назад
That was cool sir
@shaikrafik6300
@shaikrafik6300 3 года назад
U r superb sir... i love uu
@syedaltaf109
@syedaltaf109 Год назад
This is best lecture i have ever watched regarding led's
@KrrishNandrajog07
@KrrishNandrajog07 Год назад
Loved the last part 🙂🔥
@mimomimo6994
@mimomimo6994 2 года назад
I am from ethiopia 🙏 for sharing knowledge. አመሰግናለሁ
@parthivreddy7989
@parthivreddy7989 3 года назад
Great explanation
@vroom2009
@vroom2009 8 месяцев назад
I love you sir ❣️❣️
@vdevapriyavenkatesan5084
@vdevapriyavenkatesan5084 Год назад
Very great explanation. Thank u so much sir
@user-db4sv6fb9n
@user-db4sv6fb9n 2 года назад
What elements do we use to dope gallium arsenide,gallium phosphide & gallium Nitride Into p-type & n-type semiconductors
@jubayerhasan3091
@jubayerhasan3091 Год назад
This is so nice
@Sylvanexo
@Sylvanexo Год назад
This is amazing. Thanks a lot
@shaikrafik6300
@shaikrafik6300 3 года назад
Tq sir
@s.3421
@s.3421 2 года назад
Just luved it!!!! ❤❤
@rayocaballo6122
@rayocaballo6122 2 года назад
You are one fantastic teacher
@rubabayesha6625
@rubabayesha6625 Год назад
Superb
@anandsp1179
@anandsp1179 Год назад
Awsome
@khushisingh2163
@khushisingh2163 3 года назад
Thanks sir ☺️
@roshinipalanisankar6656
@roshinipalanisankar6656 3 года назад
Is the color of light from LED dependent on the nature of gas like argon / neon ? It would be great if you could reply sir . Thanks for this great video as always.
@shotoniphone13
@shotoniphone13 3 года назад
There are no gases in a LED. The inert gases you are talking about in the bulb are true, there are gases in 'Filament bulbs' to reduce evaporation of the filament and prevent its oxidation.
@vivekthumu8992
@vivekthumu8992 2 года назад
@@shotoniphone13 Thanks sir
@sia7317
@sia7317 3 года назад
Sir can you please do pyq as well❤️🥺
@lewtube6436
@lewtube6436 Год назад
What puzzles me is how you get a PN junction with a single material, that is to say, the mixture of group 13 and 15 elements. I am guessing this. That mixing groups 13 and 15 gives you both free electrons and holes, and thus a conducting material. So the result is not a diode, but a conductor in both directions. The free electrons then drop into the holes, and give off EM waves as they would at a PN junction. Anyone agree or disagree?
@mrvivek4746
@mrvivek4746 3 года назад
This is different from last video
@RajuSharma-fz2tp
@RajuSharma-fz2tp 3 года назад
On further increasing the current the intensity of the light reduces in led , why ?
@amanbajracharya7403
@amanbajracharya7403 3 года назад
Increasing the current increases the temperature thus reducing the efficiency
@ShawnDypxz
@ShawnDypxz 3 года назад
My question is: How the phosphor layer reflects yellow light when they are being bombarded by blue light? For eg, leaves appear green because other colored photons are absorbed by them but they reflect green. Please clarify. This is the biggest misunderstanding I have about light.
@ShawnDypxz
@ShawnDypxz 3 года назад
It absorbs the light from the blue LED and emits in a broad range from greenish to reddish, with most of its output in yellow. This yellow emission combined with the remaining blue emission gives the "white" light, which can be adjusted to color temperature as warm (yellowish) or cold (bluish) white.
@adwaithjayasankar3985
@adwaithjayasankar3985 3 года назад
@@ShawnDypxz Did you just answer your own question Also I thought chlorophyll gave leaves it's characteristic green color
@NOOBgamer-dn9zl
@NOOBgamer-dn9zl Год назад
Why we need blue light just use yellow led and coat it with blue, i.e just reverse coating and led
@rbkstudios2923
@rbkstudios2923 3 года назад
Why do the videos have no speed control these days Can you please fix that
@shotoniphone13
@shotoniphone13 3 года назад
You can control "playback speed" by clicking on the the three dots in top right corner
@rbkstudios2923
@rbkstudios2923 3 года назад
@@shotoniphone13 Yep Seems like they finally have fixed that
@vandanatripathi4828
@vandanatripathi4828 Год назад
Can't we just put blue colour on a yellow led
@manmohanbisht69
@manmohanbisht69 3 года назад
But neither of them are semiconductor..
@tihomirraicevic4761
@tihomirraicevic4761 3 года назад
How do you mean there was no blue leds before 2014 makes no sense to me cause there were obviously.
@KhanAcademyIndiaEnglish
@KhanAcademyIndiaEnglish 3 года назад
No, apparently they invented it in the 90s but won the Noble prize for it in 2014.
@necbd8893
@necbd8893 Год назад
Great explanation
@runzit2007
@runzit2007 3 года назад
Excellent
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