Solar cells and electric fields

In summary, the conversation discusses the confusion over an image depicting n-type and p-type silicon plates being put together. It is explained that electrons and positive holes rush towards each other, creating an electric field in the center of the plates. The question is raised about how this electric field is created and how the charges behave. The person eventually realizes their misunderstanding.
  • #1
fawk3s
342
1
solar1-labels.gif

solar1.gif


This image confuses me a tad.
We have the n-type (negative) silicon and the p-type (positive) silicon plates.
We put the plates together. The electrons are in a rush to fill the positive "holes" on the p-side, and the positive holes are in a rush to to the n-side, to the electrons.

Between the plates, equilibrium should be reached, making the center electrically neutral. Yet the other sides of the plates remain with their, charges if you like.

Now it is said that an electric field is created in the center part, which allows the electrons to flow from the p-side to the n-side, but not the other way around. How??!

Why/how is the electric field created when the center part should be neutral, and how come the "-" attract the negative charges in the picture, and "+" repell them?

Am I getting this whole thing wrong?

Thanks in advance,
fawk3s
 

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  • #2
Never mind actually. I just relized how stupid I am.
 

FAQ: Solar cells and electric fields

What are solar cells and how do they work?

Solar cells, also known as photovoltaic cells, are devices that convert sunlight into electricity. They are made of silicon and other materials that have the ability to absorb photons from the sun and release electrons, creating an electric current.

How does an electric field affect the performance of solar cells?

An electric field is an area where electrically charged particles experience a force. In solar cells, an electric field is created by the separation of positive and negative charges, which is essential for the conversion of sunlight into electricity. A stronger electric field can increase the efficiency of solar cells.

What is the role of the p-n junction in solar cells?

The p-n junction is a boundary between two layers of different types of silicon in a solar cell. This junction creates an electric field, as mentioned earlier, by separating positive and negative charges. This electric field is what enables the conversion of sunlight into electricity.

How do different types of electric fields affect solar cell performance?

There are two main types of electric fields in solar cells: internal and external. Internal electric fields are created within the solar cell by the p-n junction and are essential for the conversion process. External electric fields can be created by applying an external voltage to the solar cell. Both types of electric fields play a crucial role in the performance of solar cells.

What are some factors that can affect the electric field in solar cells?

The strength of the electric field in a solar cell can be affected by various factors such as the type and concentration of dopants (impurities) in the silicon, the temperature, and the intensity and angle of sunlight. These factors can influence the efficiency and performance of solar cells.

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