Creative Science & Research - Homemade Solar Cells.pdf - !!Creative Science & Research Schematy DIY - WMatrixie

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Solar Cells

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Homemade

Solar Cells

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Thank you for buying these plans . It will help us in our research efforts and to tell the world about this

suppressed technology.

Included is 3 different ways to make a home made solar cell :

The 1996 japan Patent is by far the best and the most powerful. The japan patent uses a simple process that has

been used for centuries, You simply screen print the negative and positive layers and the contact layers on to a

piece of glass plate, it does not matter how thick the glass is. The layers can be sprayed on with a spray gun

and a air compressor, but it is best to Screen print it. Screen printing each layer will make your solar cells last

longer and they will be more efficient

If you do not know what screen printing is, you can learn about this very simple process from the Library.

Also lots of info and supplies can be purchased at your local hobby store or art supply store. You can also buy

supply's such as screens and such at a local Screen printing shop. or they can screen print it for you. Screen

printing is very simple and cheap to do for you self right in your own home. It may take a little studying but it

will be worth it. you can print up as many Solar Cells as you want for just pennies. ( Cover your entire roof

with them. You will have more energy than you will ever need. You can then make money selling electricity

back to the electric company which should pay for it self in one to two years. The most expensive part is the

deep cycle marine batteries and your inverters. Many are making a nice income every year from this, just by

selling electricity back to the electric company, ask to see if your electric company has that type of program in

your area. most states I heard do.

The Japan method is new and it is not limited to just a glass surface, you can also apply it right onto

aluminum or copper sheeting. Look at the 1 st page, see the N type layer #2 this is what the Patent says to

Print first. But if you want to print onto a metal surface the metal surface would be #5 then the 1 st print would

be #4 then let it air dry and then bake at 600 degrees for 3 to 5 minutes.

(Each printed layer can be done this way.) Then your 2nd print would be #3, then you let air dry, then bake,

then Print #2 Air dry/bake. Then you must print a Metal grid over #2 then let air dry, (you don't have to bake

the metal print. ) This will be your negative contact, #5 will be your Positive Contact, so what your doing is

just simply reversing the printing layer steps. If you have never seen a solar cell the metal grid is like a metal

door screen but with bigger spacing. You can buy a special metal printing ink or mix it your self as the patent

says. The ink is simply made up of nickel or silver. Nickel is the cheapest and will work just fine.

Please Notice: You can not manufacture and sell the Japan Solar Cells with out there permission If you want

to leam about Screen Printing we sell a VHS Video for only $29.95

Please send $4 for shipping.

The chemicals that are mentioned in the patent are very easy to get. You can buy them in any QTY from any

Chemical supply company look one up in your yellow page phone book. Or check online, search for Chemical

Supply Shops or companies.

About Photovoltaics

Photovoltaic (or PV, Solar Cells ) systems convert light energy into electricity. The term "photo" is from the

Greek "phos" which means light. "Volt" is named from Alessandro Volta (1745-1827, He was a pioneer in

the study of electricity. So you could say that" Photo-voltaics is basically light electricity! And is most

commonly known as Solar Cells. Solar cell systems are already a very important part of our lives. The

simplest systems power many of the small calculators and wrist watches we use everyday. PV power is the

cheapest form of electricity for powering these small devices. There are many ways to make solar cells, and

one of the cheapest ways is to screen print them. There are many companies in the USA that are doing this.

Many US Patents have been issued for screen printing solar cells and there are many different chemical inks

that can be used. The Japanese Patent is one of many.

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Turning Sunlight Into Electricity!

Solar Cells convert light energy into electricity at

the atomic level. It was first discovered in 1839, the

process of producing electric current in a solid

material with the aid of sunlight wasn't truly under-

stood for more than a hundred years.

Throughout the second half of the 20th century, the

science has been refined and process has been more

fully explained. As a result the cost of these devices

has put them into the mainstream of modem energy

producers. This was caused in part by advances in

technology, where PV conversion efficiencies have

been improved.

12” x 18” 12 vdc

Screen Printed Solar Cells

Solar Cell Materials

The most important parts of a solar cell are the

semiconductor layers, this is where the electron

current is created. There are a number of different

materials available for making these semiconducting

layers, and each has benefits and drawbacks.

Unfortunately, there is no one ideal material for all

types of cells and applications.

In addition to the semiconducting materials, solar

cells consist of a top metallic grid or other electrical

contact to collect electrons from the semiconductor

and transfer them to the external load, and a back

contact layer to complete the electrical circuit.

Then, on top of the complete cell is typically a glass

cover or other type of transparent encapsulant to

seal the cell and keep weather out, and a anti-

reflective coating to keep the cell from reflecting the

light back away from the cell. A typical solar cell

consists of a cover glass, a anti-reflective layer, a

front contact to allow the electrons to enter a circuit

and a back contact to allow them to complete the

circuit, and the semiconductor layers where the

electrons begin to complete there voyages!

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Scientists in Arizona are using screen-printing, a

technique developed for printing fabrics, paper and

to produce plastic, glass and metal solar cells.

The basic materials of a photovoltaic cell (solar cell)

are inexpensive. The organic manufactured by

Ghassan Jabbour and colleagues at the University of

Arizona in Tucson have about 11/4 of the efficiency

of commercial silicon solar cells, which turn 10-20

per cent of light energy into electricity. But, being

cheap to produce, they can make up the loss in

quantity what they lack in quality. Now the Japan

screen printed solar cells are even better than that!

For more info contact: Matsushita Electric Industrial

co. LTD, Osaka. Japan

A Screen printing press, the

wood frame is the screen

In conventional Screen - printing, a taut piece of

screen mesh fabric is stretched over a wood frame,

you can buy the screens already made and the materials

from any screen printing shop or screen printing supply

company in your area or on the internet. Also you might

want to check with your local art store, sometimes they

have full kits etc...

The screen is then masked off using masking tape,

For example: a 5" x 5" square area. the screen outside

of the masking tape is then coated with a block out

liquid or paint, this is so when you apply your semiconducting ink that you mixe, it will go

through just the area that you masked off when you apply a rubber squeegee to it. The

screen can then be placed on any table top and hinges attached to the back of the wood

frame and the table, this will insure the screen can move up and down. Then get a small

wood paint stick and using a small nail, hammer one end to the front side of wood frame.

This will be your kick leg and will help keep your screen in an upward position when

needed. Take a 5" x 5" piece of glass and place it right under the open 5" x 5" area of the

open screen mesh. When the leg is flipped back the screen comes down and you grab

your rubber and wood handled squeegee and with the ink in front of your rubber squeegee

pull toward you applying pressure so ink will go through screen, once you have passed by

the 5" x 5" area then flip the screen back up and reverse squeegee to flood the screen for

the next print.

An example of a Silicon cell

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The Research group mentioned earlier , Jabbour's group, print very flat,

thin cells, onto glass in a similar way. First they coat the glass with a

transparent electrically conducting material (metal ink) that acts as one of the

solar cell's electrodes. On top of this, they lay down a thin film of a polymer,

which helps to gather current from the photovoltaic material.

Finally they deposit a blend of two organic compounds that convert light into

electricity. One is a carbon-based molecule called a fullerene, it produces

charged particles that carry an electrical current when light shines onto the

molecules. The other is a polymer, it ferries the current to the electrodes on

the top and the bottom of the solar cell.

Under blue light, these screen-printed solar cells have an efficiency of 4.3 per

cent. And the Japanese cells are much greater than that! Many of the flexible

solar cell panels that you see today are screen printed.

Now lets take a look at what The Dupont Company is doing with there solar

cells. Dupont is involved in the development of solar cell metallisation since

the 1970's. Although all PV cell manufacturers use different processes to

make there solar cells, the metallisation of the rear and front sides is in many

cases DONE BY SCREEN PRINTING! Which has shown itself to be one

of the most economic way to produce solar cells.

Recently, Dupont achieved a real breakthrough in the formulation of front-side

contacts for silicon solar cells that has resulted in customers, such as

photowatt, to realize the screen printing efficiency by changing their anti-

reflection technology from titanium dioxide to silicon nitride. This came at

just the right time for the Photowatt solar cell company, Because they have

been using there own past material for the front side metallisation since it first

started manufacturing solar cells. The development of the metallisation from

Dupont for the back side, (p-side). These pasty inks are either silver pastes

containing Al, or pure Al pastes to secure a good ohmic contact with the p-

side of the solar cell. We have told you all this to help you better understand

and leam the screen printing solar cell process and what others are doing.

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Creative Science & Research - Homemade Solar Cells.pdf

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