This is very useful explanation. Before this I've visited 20 videos which didn't contain the point to point explanations. A must watch video from technical to non technical perspective
that would be correct if the light shining on the panel ceased at that moment, but until sundown the process repeats. Photons (from sunlight) get the transfer of electrons started. One thing not mentioned in this video is that the solar panels are NOT a power supply but are merely a way to charge batteries the inverter runs on. I have also speculated that you could have water pipes below the panels to cool them as well as warm the water for heating.
Dein Wissen ist so wertvoll und wichtig, lieber Thomas. Ich fände es wichtig, unsere deutsche Sprache dafür zu verwenden! Dann könnte ich das noch viel mehr nutzen. Danke!!!
@Damosmods it takes 120 kWh/m2 to make near-future, frameless, amorphous-silicon PV modules.frameless PV were 600 kWh/m2 for single-crystalsilicon modules and 420 kWh/m2 for multicrystalline silicon/
Excellent video! I like that guys voice. I'm going solar at my house; starting small with just a few dedicated outlets that can be switched manually from grid to solar.
Thank man. Great explanation. jastanger is not right in what he said. He explained a scientific issue all we want to understand. Which your did very well. much appreciated.
very good video, very helpful. Only one thing; you didn't specify which layer is doped with which material i.e. P-type are doped with boron and N-type are doped with phosphorus. I had to look that up but once understanding that the rest of the video was good.
Ok, then how do you define "renewable"? Even the wind and our water will not last a "lifetime." The wind depends on the sun... in fact, every other "renewable" source of energy depends on it ;)
Good work, question why didn't we use PHOSPHORUS in our solar panels (switches easily from tri to di to mono forms (1,2,and 3 states of energy), is the white noise produced by SILICON interfering with our computing technology? with our carbon based lifeform? just wondering.....this is a new industry, we can still ask ..?
AC might be more efficient over a very short distance. But dude, the amount of power lost in even 1 mile of transport of DC power, is crazy comperede to the same transport in AC!
Please note Germany has already installed more than 20 GW of Solar PV from rooftop and Ground mounted Power plants. In May this year almost 50% of the Energy requirement of Germany Came from Solar PV even though i is situated very far away from the equator. Few years bck the Government gave much subsidy to promote and step by step this has been reduced Minimum with Solar PV costs that has dropped down by more than 50% in the last 2 years. Today cost/Wp is just $0.5. and closing nuclear plants..
Unfortunately, I don't want a power station next to my house. And besides, producing huge amounts of electricity at one power station is more efficient than producing a smaller amount because the speed of the turbine is increased and a magnetic field that changes at a faster pace will produce a proportionally higher amount of electric charge.
What was the purpose of bashing the oil industry at the beginning of this video? I am in the oil industry and happen to know that the some of the most significant investments and innovations in renewable and clean energy come from large oil producers. Energy is energy, and the oil and gas industry is smart enough to realize the potential in all areas of energy production. You cheapen your effort making this video with childish pokes at the "bad guy" that you see in oil and gas. We wouldn't be where we are without it and certainly wouldn't have the resources to evolve new technologies without fossil fuels.
yeah seriously, if anyone bashes oil companies, just remind them that the rubber and plastic tubing and instrument components and industrial and domestic appliance housings that kept them and their mothers from getting infected with the bacteria from the doctors' and technicians' that gave birth to them when they were born, the 'crumple zone' and airbag apparatus in their car that kept their favourite aunt/uncle alive years ago, everything, all the way up to the success of their personal economy can thanks to big oil. Big oil, and Alan Turing.
Great video! Thanks for making it! I am still confused about one thing-- when the electrons from the p-n junction are energized enough to move back into one of the layers, why do they move back to the negatively charged n-type layer, and not to the positively-charged p-layer, to which they are naturally attracted? I see that they do this eventually, but they have to go through one or more loads and through condoctor first, and experience resistance this way. Could you or someone else clarify this?
Before the electron return to its initial state, the electron needs to be transferred through external circuit. It depends on both time & energy required by the electrons to return to its initial state. You need to design the device in such a way so that the path is through the external circuit. I know it is very late...
Niki idk a lot about inverters but they convert DC current to AC and can power house items 12 v DC to 120 V AC normally you can charge electronics and do more sorry im only in fourth grade.
please help, 3:24 why does how is the eletric field a conesequence and stops the electrons from getting together with the holes? is it like a barrier of more stable atoms who already got the elecrtons for their holes?
Solar panel doesn't has a very good efficiency. But there is newer technology (but more expensive, and need a lot of space) that has better efficiency, the focused solar power (ex. Nevada Solar One). I have designed a tool, that will have very high efficiency, but also small.
The sun will deliver much more kwh per square meter. Well over a 1,000,000 kwh if you wait long enough. So specify in what time the sun delivers that amount of energy to let it make sense.
Nobody ever explains why electron move to n-type layer and holes move to the p-type. Wouldn't it be the other way around since there are many positive holes in the p-type??
the sun energy is much more expensive, because with 1M dollars invested in sun power you will produce less energy than 1M invested in oil well. so sell the solar panels, invest the cash in the bank and buy petrol with the monthly increase.
First of all, the price of crude oil is plummeting downward which is not going to lead to higher profits for those buying and selling oil. Second of all, we each have a responsibility as human beings not to continue to let money, greed, and corruption continue to plague this earth. Its NOT all about money, its about life. Its about finding technologies and solutions that are clean, efficient, and more responsible for our quality of life, and especially for future generations. We also are not the only inhabitants living on this planet either. In technology we are always looking for the next release, next gadget, and next new game changer. Your argument is like saying that when scientists were developing some of the original massive mainframe computers that they should have stopped because it cost too much money, and lets face it, we can just compute things on paper and eventually we will get the computation we want. What would have happened if they stopped because costs just seemed to high at the time? No iPhones, thats for sure. When Apple created the iPhone (it was really expensive at first, right? Like, wayyy too expensive for most casual people to spend on a silly little phone), all the other tech companies shat their pants. They however, those compabies INNOVATED, and have since leveled the market. Oil/Energy companies are greedy, winey, pieces of crap that are refusing to innovate and are trying to sabotage clean energy efforts so they can earn a few more BILLION dollars next quarter and the one after that. Why can't they suck it up, start investing in clean technologies and start refining their business model to be profitable off of them? I guess they don't have enough money. Only 6 of the top 7 highest earning companies in 2014 were Oil and Gas companies earning as little as $365 Billion and as much as $486 Billion. Oh now I understand, how could they heavily invest in solar or wind? They definitely have ZERO room to do something positive (and profitable still) in the world after raping its oceans and lands for decades.
you are right that oil wells are not ecological and veeery right that solar energy deserves a lot of attention. if somebody can invent solar energy system with the similar or higher return rate then that is gonna be great. you also said that energy companies are greedy and dont inovate clean energy. then why doesnt anybody make comtetior company which is for clean en. and sells cheaper clean energy. Because the people are poor and ''bad'' energy is better for them PS: supplying heat engines with solar heat is cheaper than photovoltaics
Do you know how much it cost to find and drill a well? Alot more than a million. Your an idiot. There are explorations costs, it takes 10 to 20 holes before you MIGHT reach oil. Its hugely expensive.
seniorgorilla i never said 1M is the cost. it can be 1B. no matter the well, petrol is cheaper and your means belgons to me and you're means you describe someone
I am doing my first year B.E..Our professor always tells us to research on various simple topics.I choose to do something on solar cells and their utilisation to maximum extent.I don't how to present the project in a way so as to make it interesting.I do feel it a stupid question to ask:( Can you please help me on how to do it?Sometimes I do not understand concepts in the book or internet.
