SOLAR TREE USING NANOWIRE SOALR CELLS

Now a days with the growing population and

energy demand will increases we have the present

energy resources are fossil fuels such as coal,

oil, natural gases,wood. but even this stock may

not longer than a few decadesSo what is our future energy sources..those are

Renewable energy Resources

INTRODUCTION

Renewable energy Resources

solar pv wind

GeothermalTidal Power hydro power

solar cell (photovoltaic cell)

convert light into a small electrical output -milliwatts output.Si wafer

Cell is thin Si wafer

Thickness is in fractions of mm

need a bank/array of cells for useful output.

cost of cells is high but reducing.

efficiency of cells is up to 10-14%/ improving

Problems faced with

current solar cell

technology

soooo......

• Different kinds of solar cells

Monocrystalline: made of single crystalline silicon of high purity. Efficiency :15-17

Polycrystalline:, made up polycrystalline siliconEffcicency : 13-15

Thin film: Made of several thin layers of semiconductor material. Effciency : 12-15

Figure A

Figure B

Figure C

Sliced into Nano-scale

Diameters from 1 to 50nm

Nano scale Silicon has a color difference

Quantum Confinement

Nano sized Silicon shows:

Physical

Optical

Electronics properties change

Electrons occupy different energy levels

NANOWIRES TO THE RESCUE

• Use Nanowires!

• Very small, increases surface area for light

absorption

• Great potential

• Nanowires in solar cells

• Increased efficiency

WHAT IS SOLAR TREE

TREE stands for

T=TREE GENERATIING

R=RENEWABLE

E=ENERGY and

E=ELECTRICITY

This is like a tree in a structure and the panels are like leaves of the tree which produces Energy.

COMPONENTS OF SOLAR TREE

The solar tree consists of manly five parts to design.

Solar Panel.

Long tower.

LEDs.

Batteries.

Stems.

WHY WE CALL IT AS SOLAR TREE

Tree can produce their own food material for human beings by the process

called PHOTOSYNTHESIS.

Likewise in solar tree solar plates are producing energy for the society.

WHY IT IS BETTER THAN TRADITIONAL

SYSTEMS

APPLICATIONS

Street Light.

House Supply.

Industrial Power Supply.

ADVANTAGES

No air pollution.

We wouldn’t have to worry as much about future energy sources.

low maintenance

Land requirement is very less.

DISADVANTAGES

Costly.

Hazards to eyesight form solar reflectors.

CONCLUSION

Saving of land, this project is very successful one.

Incresses the effciency of solar cell using nanowires

The main aim of this project is upliftting the public

opinion on R E S