Welcome Presented by

MD. RUBIAT ISLAM OVEY APPLIED PHYSICS AND ELECTRONICS ENGINEERING,RU

Contents What is Solar cell?

History of Solar cell.

Types of Solar cell.What is Photovoltaic effect?Photo voltaic generation

process.Basic circuit of my experiment.Characteristics curve.

Efficiency of Solar cell.Circuit diagram for measuring

efficiency.Why we use Solar cells?

Applications.Summary

Solar cell

A solar cell is a solid state semiconductor device that converts energy of light into electricity by photoelectric effect.

A solar cell is also known as photovoltaic cell or photo electric cell.

History

The development of solar cell technology begins with the 1839 research of French physicist Antoine-César Becquerel. In 1839 Becquerel observed that there was a light dependant voltage between two electrode immersed in an electrolyte.

In 1941 First silicon based solar cell demonstrated

In 1954 Beginning of modern solar cell research.

Types of Solar

cell

Types of solar cell is given

below,

1. p-n homojunction.

2. p-n hetrojunction.

3. Schottky barrier.

4. Homojunction hetrostructure.

5. Metal insulator

semi-conductor cell(MIS).

6. Semi-conductor-

insulator cell.

PHOTVOLTAIC EFFECTPhoto voltaic effect is the basis of

photo voltaic generation.The photovoltaic effect is the creation of voltage or electric current in a material upon exposure to light.

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N

P

load

e h

PHOTO VOLTAIC GENARATION PROCESS

V-I characteristic

s

The curve between voltage across the cell & the current flow from the cell is known as V-I

characteristics.

Basic circuit of our experiment

V-I curve

Practical V-I curve of our experiment

Efficiency of solar cell

Solar cell efficiency is the

ratio of the electrical output of a solar cell to

the incident energy in the

form of sunlight.

EFFICIENCY

DEPENDS ON

The area of the solar cell. The number of photons .The spectrum of the incident light .The optical properties - absorption

and reflection of the solar cell.The collection probability of the solar

cell .Minority carrier lifetime in the base.

Circuit diagram for efficiency

Determination of Efficienc

y

The Efficiency of a solar cell determine the capability of converting light energy into electrical energy.

Efficiency ,Ƞ=output/input

We get the solar cell efficiency in our experiment is 10.22 percent.

Why Use

Solar Cells?

• Low maintenance, long lasting sources

of energy

• Non-polluting and silent sources of

electricity

• Convenient and flexible source of small

amounts of power

•Renewable and sustainable power, as a means to reduce

global warming

APPLICATIONS

Solar pumps.Domestic power supply .Telecommunication systems.Electric power generation in space.Satellites.Remote lighting system.Toys, watches, calculators.

THANKs to all