Solar cells - fabrication & material's used | Semiconductor | Physics | Khan Academy 

00:01 Solar panels are constructed using specific semiconductor materials. 01:10 Depletion region and photovoltaic effect explanation 02:19 Balancing wire thickness and absorption area for reduced resistance 03:33 Solar cells use finger-like projections for efficient absorption and electron flow. 04:37 Solar cells require photon energy higher than band gap for electron absorption 05:43 Selecting the best semiconductor material for solar cells 06:54 Different semiconductors absorb photons differently based on their band gaps. 08:06 Efficient solar cell construction materials

U are a star !

At 8:42, I think it's worth mentioning that gallium arsenide is toxic. Hence, it's less commonly used.

The explanation is AMAZING!! Thank you Sir for the effort and dedication. You helped me a lot!

Sir, at 01:52 For photons to reach the depletion region, instead of reducing the N region, can't we just flip the whole block by 90 degrees clockwise, so that the depletion region faces upwards and everything proceeds as usual...

Thank you sir and team for the efforts...just a request can you keep the donation value flexible so that we can donate in our capacity...

Great explanation thank youuuuu!!!!

Thank you for this 🙏🏽

4:08 that's what i was looking for, thanks

Best video on this topic..

Wow Indian education seems amazing

Thank you so much.your videos save me before every exam

Very good explanation

First...🎊🎊. I did a working model of solar system ....Nd won fst prize in state level... Congratulate me...sir

Could you please explain the concept of anode and cathode?

Sir in N-type semiconductor we use Zno?

OK, but how do you get a PN junction from gallium arsenide? My guess is this. Half of it is doped with a little extra gallium to make the P type, and the other half a little bit of arsenic for the N. It appears to me that gallium arsenide in itself plays the role of plain silicon, which does not conduct. Am I right?

Thank you very much for the explanation. Sr. on 5:41 you told about the energy of majority of electrons coming from sun is E = 1.5 ev. Will you please explain it. I tried finding the energy of majority of electrons on net. However, i couldn't find it. Is this value an assumption or fact. Please answer. Thanks in advance.

Sir ,why electrons love to stay at lower energy level,as you explained electrons absorb 1.5ev but fall to 1.1 ev level in silicon by dissipating heat energy?what feature make electrons to love lower energy level?

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