SOLAR CELLSSOLAR ENERGY

Author: Violetta SurgutovaForm 8.a

Solar cell is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect.

Solar panels are made up of a set of solar cells, that directly convert solar energy into electricity.

Here is an image which will help you understand some basic terminology

better.

My family expenses:

My family mostly spends income on electricity and so I am interested in alternative energy sources

My family expenses

A year my family spends 2500 kW of energy.

According to the calculations 3 kW solar system panel produces 2850kW a year.

My family expenses

To ensure this we must buy 12 panels that cover an area of 20 square meters. We would spend 4000Ls (5700 euros)

Solar panels

Solar cells are often found :

The following is a breakdown showing where solar panels are used:

The solar cell creation for the first time is credited to Charles Fritts, who used junctions that were created when the semiconductor was coated by a very thin layer of gold.

Solar cells

Flat SC:

The most widely used types of SC:

And a vacuum tubes SC:

Latvian solar panels can be used in places where there is no connection to the power grid - a farm or a summer home.

Solar cells in Latvia

Solar battery proved themselves in space as stable source of energy that can run for a very long time.

I would like to have a solar cell in my village. I have a private house,so I could make the roof of them. I would save a lot of electrical energy and a lot of money.

It would look like this

The experts say that the panels should be placed on the roofs of buildings in the :•southern,• western,•eastern side.

Solar panels are tested in the field for many installations. Practice has shown that the service life of solar panels over 20 years.

How long will solar panels serve?

Solar panels can be placed on any roof They do not harm the nature It is possible to store electricity in batteries This energy is inexpensive It reduces the cost of electricity bills.

Benefits of solar panels:

To understand this, we should know that light is composed of a number of small energy-containing particles – photons.

How do solar panels work?

Solar panels consist of several cells, which are made of silicon.

How do solar panels work?

When light photons are absorbed in the cell, the energy of the electrons released.

How do solar panels work?

Next, the electrons pass through the cells of the adverse party, and leave further to the attached driver. This flow of electrons is called electricity.

How do solar panels work?

Young people who participate in the race Latvian "Solar Cup", manufactured car models with solar panels, which contribute to students' understanding of the fact that solar energy can and should be used.

Any pupil can make a solar panel:

Solar cells will be used a lot more in the future than now. The solar panels will be constructed for boats, motorcycles and even an entire city will be formed on solar cells

They will look like this :

Solar cells in the future:

Solar energy is also available in Latvia! Sun will never appears on the bill of energy

consumption.

Conclusion

Short-term thinking and making decisions according to the slogan " lower costtoday is better than benefits in the future ".

At present, we are very slowly mooving towars «sunny» future energy In Latvia

Problems

Lack of research & development & production phase

Problems