The Power of the Sun - The Science of the Silicon Solar Cell

[MucusFelidae]

I always hear "Adam".

Who is he? Where is he? Why is she talking about him?

[ismile4fun13]

She's cute can i suck ur cooch for an a

[WebSurferO9]

Why can't professors ever explain things so simply like in this video?

[samron921]

she's so fuckin hot

[fosheimdet]

awesome video. Favorited.

[stevethebarbarian99]

Most excellent.

[The67rockstar]

she is cute

[protchahar]

Excellent theoretical presentation combining principles of quantum mechanics and kinetic energy with semiconductors.

[Cyrix166]

Why can't my chemistry teacher be this gorgeous? I hate my university!

[itsrickinaz]

You might like Power of the Sun by Redstorm on youtube.

[ricktbdgc]

oh yeah also wouldn't the solar cell be limited to capturing energy only from a few narrow bands of light? what about the rest of the energy? why not use a prism to create a rainbow, and then shine the different colors of light on other elements in the same p-n configuration? is that even possible

[ricktbdgc]

man how you people figure this stuff out on your own?.. I'm going to reinvent the solar cell and capture 100% suns energy using fractal dome lens technology... you guys use flat surface, but due to the angle of incidence when the sun is low in the sky the power absorbtion goes down. Also light comes from all directions at once.. you gotta catch it all simulteneuously.

[MardukHail]

Awesome presentation! Thanks to UCTV for sharing!

[jcanivan]

Good job with the presentation. You covered a lot of basic concepts in a very short interval of time.

John

[suhridkhan]

excellent and lucid description of a complex idea.

[RestauranteChines]

Very VERY goood! Thanks

[kmoiselle]

it's the best explanation i've ever seen...however i think i should download it soon. I don't get everything yet and I think I should replay it for a few times. Who's too generous to discuss or explain this to me further? :)

[DemonHunterK04]

Doing a project on solar panels, this clears up a lot of different explanations. THANKS!

[ScienceOnline]

Excellent explanation!



[chrisjurgenliemk]

AAAHHHH CRAZY EYES! SHE IS EATING MY SOUL

[cav3man]

this was the best explanation i´ve ever heared. thank you

[Prayimario]

2 people do not like clean, renewable energy...

[lavpatel39]

i loved it.... I really like to know what are the major technical obstacles for Si solar cell and other types of solar cell 's commercialization. thank you

[astarke12]

@lavpatel39 The Answer is not an easy one! But the biggest problem with solar cell is their efficiency. Which means only part of the energy received from the sun can be converted to electricity. The efficiency so far achieved in the market is around 18%. An improved efficiency means one can generate the same amount of power on a reduced area, the area is related with production cost of the solar cell and associated mounting structure.

[californiadude777]

Great video! Solar Power will become a great energy resource in the future! Here in Hawaii - we have lots of sun and many people are choosing wind turbines, and solar panels as a great alternative to oil, coal and natural gas! Clean energy is the future of the world! See pristinesun . com/what-we-do.html for info. on how to save 20% on your electrical bill every month & get solar panels installed for free for your business or non-profit in any state in US! Aloha & Mahalo!

[robertamccullough]

Excellent! Thanks!

[solution246]

This video is great. The explanation and illustration are the clearest that I've seen of anything. I now feel like I totally understand how solar cells work now. I recommend it to anyone.

[ashishpagudala]

awesome video...very clear explanation....thanks to their efforts

[marielcsexy]

it help us learn

[dan4272]

Nice...very clear. Can you do one for CIGS now please!!! ;-)

[georgel19841]

I DON'T UNDERSTAND ANYTHING

[Rasmusa1]

I dont think the video is right anout the number of electrons in the 3 shell. I think the 3. shelle can hold up to 18 e- and the 4. shell can hold up to 32 e-...

[itsrickinaz]

This was absolutely fantastic! Thank you...

[domyaska]

exellent explanation !! thank you !!

[youraslave]

Trying to become rich from inventions is how you end any possibility of becoming rich (your own greed is used against you to defeat you) because you are very small attacking a very rich established powerful biz, who own the patent department so as to be the first to know of new threats to there establishments,The only way to win is to give new ideas away for free earn credibility then right a book about how you came up with idea!!!

[xcapisx]

a si me he dado una mejor idea del efecto fotovoltaico !! waoo.. gracias por el video.

[iSpammr]

this lady is scary as hell

[byScrooby]

"God: Hidden Science" - Google it!

[EUChinaECBP]

Brilliant! Give me a close look into the solar power.

[unknownsoldier07]

ok i understand everything except for P-N junctions @ 17:14 - 17:55. if the electrons from the N-type silicon were to fill the holes in the P- type silicon. wouldn't both sides be neutral? i feel like the holes and the electrons should cancel each other out. how do the charges reverse? help me out here. ha

[dson144]

@unknownsoldier07 Boron (in the p type) originally had 3 electrons, phosporous (in n type) originally had 5. At this point they are neutral. But phosphorous can donate its electron, and boron will accept it. Then the phosphorous becomes positive and the boron becomes negative. Overall, the electrons are just shifted so the boron side becomes negative and the phosphorous side becomes positive, but together they are neutral.

[voorstevius]

@dson144 and @unknownsoldier07

o.k. and that's why it is called an "intrinsic electrical field" right?

on the outside the solar cell is neutral, but on the inside ("intrinsically")

 there is a p/n charge.

Great video, great questions, great answers, thank you all !

[lmerry1]

Really really well done explanations. Wish you guys had a full budget to increase the production values, but still just a great resource. Thanks for sharing it.

[beancube2008]

Sun has energy supplies more than anything we can burn on earth. I guess after scientists get paid differently, they don't see science the same way anymore. Who dug the Middle East as our energy trap? 2009 years after the Christ, we still allow ourselves confused by somebodys suggestive languages for centralized understanding. We must allow more people free from the control of money, or the Sun would only be shining for something we have no idea.

[hthardy]

Excellant video. I have an interview with a Solar Cell Mfg company and this video

has helped me prepare for the interview. I do not have any background with solar cells, just some semiconductor experience. Thanks for creating and putting on Youtube.

Over 50....

[Doversreturn]

so could you cater the solar collector to different spectra of light,or does this mean you need to optimize a cell to the best specrum of light.I'm so confused . i wish i paid more attention at school.

[dson144]

@Doversreturn I think since our sun has its peak radiation at a certain energy (green light), we need to pick the cell to have a band gap near that energy. Maybe if our sun was a different temperature the radiation spectrum would shift enough to justify using a material other than silicon. But I'm not too sure.

[Thymonico]

Thanks a lot! :D

[VN7501]

nice ... now i can continue my project about solar power

[De4sher]

the narrator lady is freaking me out big time. watch her body language and face expression.....

there is obviously something horribly wrong with her, but then i have met a lot of female physics teachers with similar problems.

Either that, or she's never been in front of a camera before and is terrified, but trying to fake it. Don't try to hide fear people, you can't.

[jamieball]

maybe she is an alien hehehe

[De4sher]

dunno, but after all this time, she is still freaking me out. I think I will continue to be freaked out by this lady till the end of time.

Or till the aliens come, in 2012 ;)

[australianpwned]

Thankyou so much!

Such a huge help with high-school physics!

Thankyou!

[robbyplad]

i agree! :D thanks

[ineedchargemyself]

even mein english is not so good,i can understand it so easily by the pictures.

[orangeblueandlavenda]

this is a good video but we need to invest in dark light solar cells.

[vietarc]

The only thing puzzle me is that you can stick a wire to the positive end of the house outlet and the other end to the ground and still get electron flow. How do they get those electrons back?

[juscurious]

I have only one question, what do you do at night or for days when the sun does not shine?

[SSJLIGHT]

Backup power, my friend. Have a storage unit for the energy.

[juscurious]

Exactly what type of storage unit. Can you give me some specifics? Will the backup unit be natural gas, oil, hydro, hamster cage?

[SSJLIGHT]

Redox flow or sodium-sulphur batteries, hydrogen in combining hydrolysis to produce hydrogen with fuel cells to convert it back to electricity, pumped storage is a few I can think of when connected to the system.

[juscurious]

And where precisely is such a system in operation commerically or experimentally? Where is the research being done?

[nickrhill]

This is by far the clearest explanation of semiconductor structure I have seen.

[SSJLIGHT]

Here, here.

[panterafan01]

how right you are. i almost cried.

[MafiaDany]

This is the future power suply

[mory134]

coool now i got it

[timepass99]

I got it. Thank you