什么是光伏发电？

1839年

法国物理学家A.E.贝克勒尔意外发现

用两片金属浸入溶液构成的伏特电池

在受到阳光照射时会产生额外的伏特电势

这就是光生伏特效应

后来人们利用这个原理

制造出了可以发电的太阳能电池

我们知道

想要通电，首先得满足两个条件

1、有足够的自由电子

2、这些电子得定向移动

那么，光伏发电的具体原理是什么呢？

太阳能电池

是由两块硅板组合构成

电池为什么长这样？

原子是由原子核和电子构成的

而电子会分好几层围绕着核转

人们发现

通常最外层要有八个电子

原子才会比较稳定

但多数原子却达不到八 个

What is photovoltaic power generation?

In 1839,

French physicist A.E. Becquerel made an accidental discovery

A volt cell consisting of two pieces of metal immersed in a solution

It creates an extra volt of electric potential when it's hit by sunlight

This is the photoluminescent Volt effect

The picture

Later people used this principle

Creating solar cells that can generate electricity

The picture

We know that

In order to get electricity, two conditions must be met

1. There are enough free electrons

2. The electrons have to move in a directional way

So how does photovoltaic power work?

Solar energy cell

It's made of two silicon plates

The picture

Why do batteries look like this?

Atoms are made up of nuclei and electrons

And the electrons will go around the nucleus in several layers

And it was found that

Usually you have eight electrons in your outermost shell

Atoms are more stable

But most atoms don't have eight