What is solar energy? How can we harness solar energy? How a photo voltaic cells work? Present status of solar energy in Bangladesh.

1. SOLAR ENERGY
Presented By
Sadiqur Rahman
ID: 1802050111
Shamima Shammi
ID: 1802050113

2. What is solar energy ?
• Solar energy is the energy received by the earth from the sun.
• Solar energy Originates with the thermonuclear fusion reactions
occurring in the sun.
• Represents the entire electromagnetic radiation (visible light,
infrared, ultraviolet, x-rays, and radio waves).

3. Types of solar energy
• Passive Solar Energy
• Active Solar Energy
• Photovoltaic Solar Power
• Solar Thermal Energy
• Concentrated Solar Power

4. Uses of solar energy
• Heat Your Swimming Pool With Solar Energy
• Solar Energy Can Heat Your Water
• Solar Energy For Battery Charging
• Power Your Home With Solar Energy
• Solar Energy For Cooking
• Solar Energy for Indoor Lighting
• Solar Energy Used For Outdoor Lighting

5. Solar Technologies
• Daylighting
• Passive Solar Heating
• Active Solar Heating
• Concentrating Solar Thermal
• Photovoltaics (PV)

7. Photo + voltaic = convert light to electricity
The heart of a photovoltaic system is a solid-state device called a called a
solar cell.

8. Energy Band Diagram of a Conductor,
Semiconductor, and Insulator
Conductor Semiconductor Insulator

9. Silicon is group IV element – with 4 electrons in their valence shell. When silicon
atoms are brought together, each atom forms covalent bond with 4 silicon atoms
in a tetrahedron geometry.

14. How Solar Cells Work
• Photons in sunlight hit the solar panel and are
absorbed by semiconducting materials to create
electron hole pairs.
• Electrons (negatively charged) are knocked loose
from their atoms, allowing them to flow through
the material to produce electricity.

24. Thank You
Bask in Sun
Stay Warm