Photovoltaics

Hello, folks. Welcome back. So I want to introduce the concept of energy payback time in this Photo-voltaic systems in this video. And since I'm an engineer and engineers love Three and four...

And, again a picture of that terrestrial spectrum. This is the kind of absorption you might find in a conventional solar cell. This is what you might do if you had a multi-junction solar cell....

Other questions. (female speaker). In these multi junction, multi layered ones, like the typical ones that a house would use now absorb mainly the red part of the spectrum, is that right? (Dr....

So what happened along about the year 2000, is that solar PV took off in terms of production and was now using a lot more of the silicon feed stock, and along about 2005 the actual total went above...

Now there are a couple of things going on here, one is we scatter a lot of light in our atmosphere so that you're not getting the ultraviolet light down on the ground that you get up in space....

And last but not least, there are systems that are proposed where you can make more than one. In our ideal solar cell we only made one electron whole pair per photon. What if you could make more than...

Khai thác nguồn năng lượng của mặt trời với công nghệ có thể nhân rộng độc lập, đáng tin cậy và hứa hẹn đem lại nguồn năng lượng tái tạo, sạch, và giá thành thấp hội tụ năng lượng mặt trời và chuyển...

[instrumental music] [Roger Claypool] I've learned that there's so much more to it than just buying a panel and plugging it in. [instrumental music] There's so many more...

Now if you submit that to, if you shine light on that, what you have done is you will then generate an electron whole pair, and because of the asymmetry and the concurrent field that is produced, the...

So photo voltaic effect has a very long history, and what I want to do in this couple of videos is to present you a brief timeline, or you know, summarize some of the ways key events which happened in...