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Solar Energy Can Be Used for Heat and Electricity... Working principle  When photons strike a photovoltaic cell, they may be reflected, pass right through, or be absorbed.. Only the ab

Our sun and solar energy

Group 3

1. Luu Ngoc Anh

2. Phan Duc Dung

3. Dang Thi Ha

4. Phung Thi Huyen

5. Vuong Thi Quynh Phuong

Solar energy

Solar energy

The sun in ancient cultures

The Greeksconsidered Apollo as the god

of the Sun

The sun in ancient cultures

The Egyptians saw

the sun as the eye of

Ra - creator of light

and… all things.

The Egyptians saw

the sun as the eye of

Ra - creator of light

and… all things.

Ability to shine forever

Before 19th century, people believed that the sun was

composed of some special material that had a ability

to shine forever.

Hermann Helmholtz

Hermann Helmholtz asserted that it was the mass of the Sun itself that provided the gravitational energy to

heat it up

Arthur Stanley Eddington

In 1926 Arthur Stanley Eddington asserted that the sun was converted hydrogen into helium in a process which he called the “transmutation

of elements”

Our Sun and its energy

Solar energy is radiant light

and heat from the sun

Solar Energy Can Be Used for Heat and

Electricity

Working principle

 When photons strike a photovoltaic cell, they may be reflected, pass right through, or be absorbed.  Only the absorbed photons provide energy to generate electricity.  When enough sunlight (energy) is absorbed by the material (a semiconductor), electrons are dislodged from the material's atoms. 

 An electron imbalance is created between the front and back When the two surfaces are joined by a connector, like a wire, a current of electricity occurs between the negative and positive sides

 When photons strike a photovoltaic cell, they may be reflected, pass right through, or be absorbed.  Only the absorbed photons provide energy to generate electricity.  When enough sunlight (energy) is absorbed by the material (a semiconductor), electrons are dislodged from the material's atoms. 

 An electron imbalance is created between the front and back When the two surfaces are joined by a connector, like a wire, a current of electricity occurs between the negative and positive sides

Working principle

Some types of solar cell

At present the world are using three types of solar cells: solar panels crystal (monocrystal, c-Si), multi-crystal (polycrystal, p-Si) and amorphous thin film

(amorphous a-Si)

the performance of photovoltaic batteries monocrystal Si), polycrystal (p-Si) and pin amorphous silicon (a-Si)

RESULTS VIA A DRY SEASON

 - Pin c-Si: 890 - 970 kwh / kwp,

 Pin p-Si: 850 – 960 kwh / kwp,

 - Pin a-Si: 960 - 1060 kwh / kwp

Solar quality cheap used nanopillar

STRUCTURE OF PIN NANO

CHARACTERISTICS OF ROAD

Atomic nano-battery

Atomic nano battery will be used throughout the equipment and machinery, from

medical equipment to artificial satellites and navigation equipment on ships

Cheap solar cells made from ink

Solar Korgel of the form like an ink formed by the nanoparticles.

Plastic cell

 Flexible battery that can bend so it can be installed anywhere

Silicon solar cell

Silicon solar cell

 N - type semiconductor layer: This semiconductor

is usually made from arsenic-miscellaneous silicon.

 P - type semiconductor layer: This semiconductor is usually made from boron-miscellaneous silicon.

Silicon solar cell

 When the p-type layer contact with n-type layer, at the contacting domain, that we usually call p-n junction or space, there appears a contacting electric field direct from n-type layer to p-type layer Reason for the appearance

B-of this field is the diffusion B-of charge carriers (electrons from n-type layer to p-type layer and vice versa In the p-n junction, there are no charge carriers, so it is a neutral region.

 When photons in sunlight hit the solar panel, they are absorbed by semiconducting materials Photons will “attack” atoms of semiconductor which lie at the p-n junction This attack causes an effect called “internal photoelectric effect”, therefore in the p-n junction, the charge carriers are created Immediately these charge carriers are affected

by the contacting electric field and move to the electrodes.

How it work ???!

Structure of an array

This is the car that be

used by solar energy and went

to traversing about 38 countries.

Application

 A car used 70% solar energy which made by architect Italian.

Application

Our future depends on our action

Seeing the future

Now, solar energy is widely used by its outstanding advantages.

Thank you for your attention !