Pros and Cons of Gallium Arsenide Solar Cells

Gallium arsenide solar cells are very efficient but are expensive. Their efficiency reaches as high as 29% in laboratory and about 20% in real world. Multi junction or tandem solar cells can show even up to 40.9% efficiency. These solar cells are formed by depositing several thin layers of single crystal layers on top of the substrate. The layers are doped oppositely to conduct electricity. Due to heat resistivity and high absorption they have found extensive applications in spacecrafts.

Advantages of Poly Crystalline Solar Cells

Polycrystalline solar cells are cheaper than mono crystalline solar cells but are costly as compared to thin film cells. Their efficiency is less than mono crystalline cells but greater than thin film solar cells. In February of 2009, Mitsubishi Electric Corporation achieved 18.9% efficiency with polycrystalline solar cells whereas thin film solar cells convert have just 11% efficiency.

Energy-Efficient Solar Pool Covers

A solar pool cover is energy-efficient and prevents the loss of heat from the pool water. It also prevents evaporation of water and saves it. A solar pool cover transfers heat energy from sun to the pool water to warm it, reducing your energy bills up to 75%.

Quantum Dot or Nano Crystalline Solar Cells

Quantum dot or nano crystalline solar cells have very high efficiency and are formed by spin coating. The ability of carrier multiplication has made it many times more efficient than other solar cells. Carrier multiplication means it can excite many electrons per incident photon. The materials used in these cells include lead selenide (PbSe), cadmium telluride (CdTe), titanium dioxide (TiO₂) and lead sulfide (PbS).

Thermosiphon Solar Water Heating System

Thermosiphon water heating system is a passive water heating system. It works under the principle of convection. Hot water rises up and warm goes down. Gravity is responsible for pulling the cold water down. That is why these systems are generally vertical. Hot water from the top layers is utilized. Heating can be done directly or through a heat transfer fluid.

Mono Crystalline Solar Cells

Mono crystalline solar cells are the earliest form of solar cells. They are formed by depositing thin silicon wafers over rigid glass substrate. They have polka dotted shape. They are very efficient but are expensive and wasteful of material. These are being replaced by polycrystalline solar cells in the market.

Gas Hybrid Cars: Relief To Your Pocket And Environment

Gas Hybrid cars are becoming more and more popular in the auto industry due to the features they offer when comparing to the conventional cars. Before buying a hybrid gas car or even making a decision, one must decide whether features offered by Gas Hybrid cars suits his lifestyle or not!

Dawn of Alternative Energy Resources

Alernative energy resources are an urgency that need to be dealt with. The governments of countries like Brazil have already started to settle for it, and so should others. Because alternative energy resources are now not a luxury, but a need that soon will be sought to as oil and gas amounts near their end.

Solar Powered Jacket: Charging Gadgets On The Move

Every now and then a person gets in to a situation, when he needs his gadget and all he gets in reply is battery low. To counter these situations have a look on Scottevest Solar powered jacket – which can charge all of USB charger suppoted gadgets while you are on the move.

Interesting Facts About Solar Power

Ever growing prices of renewable fuel are also increasing the magnitude of utility bills so it is worthwhile to choose renewable energy sources. One must understand some facts about Solar power to help him decide – why to choose Solar power for that big investment out of so many renewable enrgy options?

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Energy Saving

Revolution Of EPA Hybrid Cars

Revolution Of EPA Hybrid Cars

Do you wonder why EPA hybrid cars are ruling the world of cars these days? Well, here’s a simple answer; they are energy-efficient. EPA hybrid cars not only save your fuel and money but also save the environment by producing far less pollution than a normal vehicle.

Energy Sources

Top Oil Supplying Countries For USA

Top Oil Supplying Countries For USA

The fastest growing economy in the world uses the largest amount of oil supplies. The United State`s top oil suppliers list is very unique and it many surprise many people. From Canada to Nigeria and Angola, have a look at USA`s top oil suppliers and how much oil they provide USA each day.

Environment

Most Awaited Eco Concept Cars

Most Awaited Eco Concept Cars

Eco concept cars are creating hype in the automobile engineering industry. Many renowned brands are introducing eco concept cars, to save the environment together with auto industry. So, check out the most awaited eco concept cars and admire the inventors.

Geo-Thermal

Important Facts About Thermal Energy

Important Facts About Thermal Energy

Thermal energy or heat energy affects our daily lives in many different ways. The sun is the main source of solar energy. Even in winter, it throws substantial amount of heat on ground level. Thermal systems comprise of various products that include essential items, attachments and accessories.

Global Warming

Global Warming

Global Warming

Many threats are being faced by the human race. However the most grave and serious issue that is threatening the integrity of the prime race is Global Warming. Global Warming is one issue that needs to be addressed promptly and with a lot of care. Survival with cooperation is the only option out of danger.

Green Electricity

Using A Solar Battery

Using A Solar Battery

The batteries are the source of the power in most of stand alone electrical appliances. These batteries come in a wide range of configurations and the solar batteries have gained popularity in recent decades. These are similar in handling to the lead acid batteries and very easy to use. They are easy to maintain and the owner has to just follow few precautions. Correct and timely maintenance prolongs the life of the solar battery and saves precious money for the consumer.

Green Energy

Free Solar Energy For Homes

Free Solar Energy For Homes

Solar energy is a cheap source of energy and people are converting to this source at a fast rate. However, one must assess certain factors before he decides to convert his home to solar energy. A careful evaluation of these factors will help you in selection of a suitable solar energy system at a very convenient price.

News

Growth Of Nanosolar System

Growth Of Nanosolar System

Nanosolar introduced thin-film solar cell with a new innovative idea. It comprises of a thin metal sheet with nanoparticles ink sprayed on it. This reduces the cost of electricity largely. This technology is gaining popularity worldwide and there is a sudden increase in the demands for thin-film solar cells.

Nuclear Energy

Nuclear Power – Alternate Energy Source

Nuclear Power – Alternate Energy Source

The use of atomic energy is an alternate source of energy has vast potential. Normally nuclear reactor runs fantastic rate of 80% efficiency. Like all other sources of energy, there are residue materials for nuclear reactors too. The disposal of residue is the core area of concern for preservationists. It emits radioactive rays for very long period and therefore proper disposal is necessary. 50% of the power requirements of 5 states of United States are met using nuclear reactors.

Solar Energy

Benefits Of Trombe Walls

Benefits Of Trombe Walls

Trombe wall is a useful design modification done in the building structures. It traps the energy of the sun during day time and uses it to keep the rooms warm at night. It is an inexpensive way of heating the rooms and the walls are very easy to construct.

Tidal Energy

Hydroelectric Power: An Introduction

Hydroelectric Power: An Introduction

Hydroelectric power is a remarkable discovery, of today’s world. Keeping in view, the speed with which fossil fuels are running out,it easily satisfies our energy demands. Although, it has a few disadvantages; its advantages outweigh them. This proves the vitality of water in our lives.

Wind Energy

Benefits of Wind Turbines

Benefits of Wind Turbines

Wind Turbines are one of the most popular means of power generation. Wind Turbines can be used to harness power generated from Wind. Wind Energy is nature friendly the turbines are reliable and cost effective. Governments are also providing incentives for the users of wind energy.