The Working of Solar Panels

Curious how solar panels produce electricity from sunlight? Explore the photovoltaic effect, electron flow, and the science behind modern solar technology in this easy-to-understand guide. Learn how silicon cells convert sunlight into usable electrical energy and power the future of clean, renewable energy.

Introduction

Welcome to my 3.5th? Blog? Well yeah, you heard it right, 3.5, why? Because it is by itself a topic it doesn’t include anything, so I stuffed the photovoltaic effect in it, just like one time, I thought that elephants could somehow fit in fridges….. Idk why. So, yeah. Solar panels and photovoltaic effect, that’s what we are doing!

Solar Panels

Solar panels are big “panels” made from joining multiple solar cells together that generate electricity when sunlight falls on solar panels, as simple as that, but not so fast, hold your horses….. is not “just” so simple it has a few tad bits of stuff that happens, so that it can convert sunlight becomes electricity. So what happens? *learning music plays*

Solar panels are mainly made up of materials called semiconductors (a midway between conductor and insulator, aka something that allows electricity to pass through itself, but not fully.) This semiconductor is usually silicon.

A solar panel is like a sandwich which is made of multiple layers which starts with a tempered (strong) glass sheet with an encapsulant (a thin transparent plastic layer to protect the solar cells) below which lie the solar cells with another encapsulant and a backsheet which protects the panel from moisture and electrical leakage, all this is held by a aluminium frame, behind it is a small box out of which the wires come out, called the junction box. And that is a solar panel :)

And how do they work?

*More learn time*

Photovoltaic Effect

In this section, I will tell you how the sunlight actually turns into electric current. It happens due to a process called photovoltaic effect, in which photo means light and voltaic means voltage.(Hope so)

Btw solar cells are also called photovoltaic cells.

When sunlight hits the solar cells and the energy from photons (particles of light) free the electrons and get them moving, creating ‘holes’, but this movement alone can’t be electricity, the electrons will just move randomly and cancel each other out. The key point here is that the thing that forces the electrons to move in a specific direction is a thing called the p-n junction. What is this? You may ask, so let us take the sides. One side has more electrons (the n-side), while the other has more holes (the p-side). One thing, “hole” is just the absence of an electron, like an empty parking lot. So, these two sides create an electric field in which one side attracts electrons and the other side repels and when you connect the two sides to a circuit, electric current is formed! Done, not so hard was it?

Conclusion

So, that was it. I bet you thought that this would be very long like the other ones, but this is why I call it the mighty 3.5! *Angelic music* yeah. Oh and btw the solar panel only generates direct current, it needs to be converted to alternating current for proper home use. What is AC and DC? I will be leaving that for the next blog in which I will also be talking about…. About…. I…. I forgot. 😐 Wait.. no… yeah I got it.. It was the working of turbines, so yeah that will be my 4th Blog. Till then!

Nothing just “happens”, it will have a process behind it and if there isn’t, then it’s just that we don’t know it yet…