什么是光伏發(fā)電？

1839年

法國物理學(xué)家A.E.貝克勒爾意外發(fā)現(xiàn)

用兩片金屬浸入溶液構(gòu)成的伏特電池

在受到陽光照射時會產(chǎn)生額外的伏特電勢

這就是光生伏特效應(yīng)

后來人們利用這個原理

制造出了可以發(fā)電的太陽能電池

我們知道

想要通電，首先得滿足兩個條件

1、有足夠的自由電子

2、這些電子得定向移動

那么，光伏發(fā)電的具體原理是什么呢？

太陽能電池

是由兩塊硅板組合構(gòu)成

電池為什么長這樣？

原子是由原子核和電子構(gòu)成的

而電子會分好幾層圍繞著核轉(zhuǎn)

人們發(fā)現(xiàn)

通常最外層要有八個電子

原子才會比較穩(wěn)定

但多數(shù)原子卻達(dá)不到八 個

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