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Graphic how Photovoltaics works
Photo-VoltaicEnergy harvested from the sun
|Earth needs an environmental balance!||Save Earth|
Renewable energy reduces our emissions|
Emissions that cause Climate Change
Emissions that endanger our children
The use of Solar energy can be
quite nice to look at.
You can see here Solar electric cells +
Solar hot water heating panels.
Solar power - also known as solar energy)is the technology of obtaining usable energy from the light of the sun.
Solar energy has been used in many traditional technologies for centuries.
The name derives from the Greek word 'phot' what means light and from
the unit for electrical current volt which was named after the Italian Alessandro Volta.
Light to electricity = photovoltaic
Photovoltaics on a roof
Sunlight is Earth's primary source of energy. The solar constant is the amount of power that the Sun deposits per unit area that is directly exposed to sunlight.
The solar constant is ~1,370 watts per square meter or ~1273 watts per 10 square feet
How does Photovoltaic work?
The direct conversion of light into electricity at the atomic level is called photovoltaics. The photoelectric effect can cause some materials to absorb photons of light and release electrons = electricity.
In 1839, the French physicist, Edmund Bequerel, was the first, who worked with materials that produced small amounts of electric current when exposed to light.
In 1905, Albert Einstein described the nature of light, the photoelectric effect . Einstein won a Nobel prize in physics.
In 1954, Bell Laboratories have built the first photovoltaic module. It was billed as a solar battery but too expensive to find a market.
Bear Springs Blossom Nature Conservation is using Solar energy in different ways.|
YOU can do that too!
Use the power of the sun:
A) to produce electricity with our windmill
B) to produce electricity with Photovoltaic systems.
C) to warm up our water
C) to produce hot water for your home
BSB provides information on all RENEWABLE ENERGY sources.
We can give you advice * what prices to expect, *
what system would fit to your needs ..
When the sun shines on photovoltaic cells
they produce DC direct current electricity
of about 0.5 volts on each cell.
Adding up many solar cells you can produce
any Volt amount of solar electricity.
Use free energy from the sun:Heat (hot water, building heat, cooking)
Electricity generation (photo voltaic, heat engines)
Desalination of seawater.
Solar design in architecture
Solar heating systems
Solar thermal electric power plants
Concentrating collector with steam engine
Concentrating collector with Stirling engine
Solar updraft tower
Solar powered car
Many scientists work on new solutions|
Were you aware that a North Carolina State University staff has demonstrated that water gel-based solar devices (known as: "artificial leaves") can work like solar cells to generate electricity?
The results prove the idea for making solar cells that more closely mimic nature. They also have the possibility to be less costly and more environmentally friendly than the recent standard silicon based solar cells.
The bendable products are composed of water-based gel infused using light-sensitive molecules (like plant chlorophyll) coupled with electrodes coated by carbon materials, such as carbon nanotubes or graphite.
Graphene is the fundamental structural element of a number of carbon allotropes including graphite, carbon nanotubes and fullerenes. Graphene is a 1-atom thick planar sheet of carbon atoms that are densely packed in a honeycomb crystal lattice. The name comes from graphite ene; graphite itself consists of many graphene sheets stacked together.
The light-sensitive molecules get "excited" by the sun's rays to create electricity, similar to plant molecules that get excited to synthesize sugars in order to grow.
Dr. Velev affirms that the research team hopes to be able to "learn how to mimic the materials through which nature harnesses solar energy." Although synthetic light-sensitive molecules can be used, Velev says naturally made products, like chlorophyll, are also very easily integrated in these products because of their water-gel matrix.
Velev even imagines a future in which homes could be covered with soft sheets of similar energy-generating artificial-leaf solar cells. The concept of biologically inspired 'soft' units for generating electricity might in the future provide an alternative for the present-day solid-state technologies.
Join BSB to get the knowledge how solar energy works,
to understand Nature - become a member
Photo voltaicSolar energy = Light to electricity
Protect Earth with renewable energy. Use photo-voltaics - change the sun's power into clean electricity!
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BSB Information on Earth:|
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- Why is Earth sick?
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