Tag Archives: silicon solar cells

Pros and Cons of Gallium Arsenide Solar Cells

Gallium arsenide solar cells are marked by high efficiency and high price. Due to these reasons, they have found most of their applications where such a high efficiency is required and the budget of the project allows their use.

Aerospace industry is the most important industry where these cells are being used extensively.

Efficiency of Gallium Arsenide Solar cells

These cells have efficiency as high as 29% during laboratory testing. But, since the conditions are different in real world, their efficiency drops somewhat but they can still show an efficiency of 20%. The greater efficiency in laboratory is mainly because a concentrated light source is used to calculate the efficiency there.

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Mono Crystalline Solar Cells

Mono crystalline solar cells are the earliest form of solar cells. With the growing demand of energy in the world, the concept of renewable energy has attracted the attention of not only the scientists and researchers but also the consumers and common people.

How are mono crystalline solar cells formed?

There are several steps involved in their production and formation. But the basic outline of the procedure involves the following steps.

  • Cylindrical ingots of silicon are used for the preparation of these solar cells.
  • Ingots are long rectangular or oblong blocks of silicon.
  • Thin wafers are cut out of these oblong blocks of silicon.
  • The process of sawing is used the most frequently for cutting of the wafers.
  • Great care has to be taken since the wafers are extremely thin and the dimensions have to be very accurate.
  • Another important thing which is required is a rigid glass substrate.
  • The wafers of silicon are then deposited on the glass substrate.

Appearance of Mono crystalline Solar cells

These cells appear to be polka dotted. They have gaps at all corners of the cell this shape gives them a unique appearance. Among all kinds of solar cells, these cells are the most easy to recognize.

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Producing Electricity From Sillicon Solar Cells

Natural resources of fuel are at a risk of being eliminated due to their consumption in very large amount. Scientist are trying to find new ways of producing fuel. One of them is the solar energy. Solar systems have been invented which convert heat energy into electricity. These solar systems are now in use and are cheap source of electricity. To understand the whole working of the solar energy systems, one must understand about the basic thing that is “Solar cell”.

Use Of Silicon In Solar Cells

Use Of Silicon In Solar Cells

The world has progressed rapidly in the field of solar energy. It is easy to use and is cheapest form of energy. To understand about solar energy system, one must start from basic level.,, a solar cell. The basic component of the solar cell is the semiconductor used to convert heat energy into electric charge. Many elements are now being used for this purpose but the best element that has been used from a long time and is still a part of many solar devices is Silicon. The guide line for solar cells is provided by the silicon structure in a photovoltaic (PV) cell. The current is produced in these cells by movement of the electrons from their respective shells. To move more electrons, additional impurities are added in silicon.

Producing Electricity From Solar Cell

A solar grade is made up with a crystalline structure. Semiconductor used in the cells is Silicon atom having three layers holding electrons. The no. of electrons increase in the center of atom. When the electrons from the outer shell of silicon escape, electrons from inner shells move to replace them. This moving results in creating a locked structure. Due to this reason, most of the silicon solar cells ape P-type or N-type silicon cells. N-type cells are added with the impurity that is mainly phosphorous which helps more electrons to escape from the outermost cell of silicon atom. Continue reading

Solar Cell’s Material Effects on Efficiency of Solar Cell

With the passage of time advancements are coming in solar technology. This technology is improving and providing affordable energy. The proof of the advancement is new solar cells, the related industry is expanding and innovations are coming day by day. New one is better from the previous one. Now solar cells are available type of sizes and shapes.

Three generations of the solar cells

Three generations of the solar cells

You will find three generations of the cells which the solar industry has produced, each of them have cells of their own kind. In the very first generation you will find silicon-based cells. In the second generation variety of cells were introduced, these cells were mainly coated with a thin-film moniker and silicon is still used in these cells. To achieve maximum efficiency at low production coast, in the third generation cells the edges of the cells were cut. Every cell coming out of these generations has its own characteristic.

The solar cells are mainly differentiated by their size, shape and their semiconductor material. The solar cells having same material can also be differentiated further on the basis of unique characteristics. This characteristic separates one cell from other and also separates solar modules from one another.

Mono-crystalline solar cells

The mono-crystalline solar cell is known as father of modern solar power system. These cells are single-crystal and are made from a block of silicon known as cylindrical ingot. Continue reading

Third Generation Polymer Solar Cells

Solar energy is one of the most useful and vital forms of energy. It can be easily produced by the harnessing of Sunlight in to potential electricity. Electricity can be then used in various commercial and domestic projects. Solar Energy is an alternative form of energy. It can be quite useful in making benefits for people of all age and regions. Sunlight is received by the Earth in almost all parts. It can be effectively converted through Solar Cells.

Third Generation Solar Cells

Third Generation Solar Cells

Solar Cells are the name given to the device that is responsible for the generation of Solar Energy. Solar Power Panels come equipped with the Solar Cells. These Solar Cells are capable of generating power when the light strikes their surface. However Solar Energy has various other uses as well. The introduction of modern techniques has also changed Solar Energy greatly. A new generation of Solar Cells has been introduced to the market.

Polymer Solar Cells

The latest and perhaps the final type of Solar Cells are the Polymer Solar Cells. These are the latest and most useful innovation to date. Continue reading

Solar Cell Elements by Generation

A photovoltaic (PV) cell or a solar cell is itself an important element of a solar panel or module. Solar or photovoltaic cells are made up of a material (usually silicon). This material functions as a semiconductor.

Silicon Solar Cells

Silicon Solar Cells

Usually, silicon is used to produce solar cells. There is wafer-thin sized silicon that absorbs solar heat and generates electricity as either electrical current or free-flowing electrons. These electrons or electrical current is captured by diodes that are connected to the semiconductor.

Other Generations of Solar Cells

Silicon is not the only most popular and sully functional element of solar or photovoltaic cells. It is because there are two other distinct generations of solar or photovoltaic cells. Each of these two generations is having different important elements, but all generations are working to achieve the same goal.

Thin-Film or Second Generation Solar Cells

Thin-film solar or photovoltaic cells make the second generation of solar cell technology. However, the solar cells of second generation may still use the silicon as the main material source (usually amorphous silicon). In addition to this, second generation solar or photovoltaic cells also utilize other materials like copper indium gallium selenide (CIGS) and cadmium telluride (CdTe). Continue reading

Solar Cells by Generations

There are four distinct generations or categories of solar photovoltaic (PV) technology, the electricity generating heat of the solar panel and solar cells. These generations or categories represent a kind of timeline of innovations and changes that have been introduced in solar power technology. These generations and categories are separated by characteristics like application, semiconductor material and stage of development.

First Generation of Solar Cells

First Generation of Solar Cells

It is not only the oldest but also the most commercially widespread generation of the solar cells. This generation is characterized by conventional silicon wafer solar cells. These solar cells utilize thinly sliced silicon wafers that act as semiconductor. It is an important part of the solar cell that absorbs photons and by exciting its electrons to generate applicable electric current.  Currently, silicon solar cells are capable of controlling roughly 80 percent of the photovoltaic market due to their higher conversion efficiency. Although, this efficiency is expected to alter as the next generation of solar cells is more efficient and cost effective.

Second Generation of Solar Cells

This generation of solar cells is characterized by thin film and building integrated technology. The solar cells of second generation are thinner, more cost effective and more flexible than their counterparts of first generation. In this generation the types of semiconductor material has broaden. New materials have introduced that include amorphous silicon to calcium telluride and copper indium gallium selenide. It is expected that second generation’s thin-film solar cells will take over the market and eliminate the first generation’s solar cells from the trend within 5 to 10 years, but so far it is just an expectation. Continue reading

Portable Solar Panel From Esico

A new, portable solar panel has recently been introduced by Esico, which will make it very convenient for people to use solar energy while on the go.

solar panel

The company already manufactures a wide variety of solar energy products that now include the solar portable folding panel as well. The panel comprises of 18 silicon solar cells, each measuring 33 x 50mm. The portable solar panel can provide power to a number of different products such as tent fans, street lights, radios, house lights, portable televisions, flash lights, garage lights, ventilators and warning lights. It is also possible to use the portable panel in boats, cars, recreational vehicles and camping.