PhotoVoltaics

We still have to miles to cover before solar power can replace the fossil fuels and become a cheap and effective solution for common folks. But it is indisputable that sun is the single greatest fuel source we can harness to our advantage. Solar energy can leave its impact on a global scale in a significant manner. Everyone who is blessed with a hot, sunny spot by the grace of the nature could one day power their homes entirely by photovoltaic roofs. Even it seems possible that large solar arrays could feed power plants that keep the lights on in entire municipalities. 8 Comments

MIT professor Daniel Nocera earlier worked on a catalysts that can divide water molecules which can be utilized to store energy. Daniel Nocera has established a company named as Sun Catalytix to give his dreams a concrete shape. His company is backed by venture capital firm Polaris Ventures. Nocera is known as a "huge centralized energy person." When he thought about the problems faced by developed and developing world then formed the view that the solution to energy problem lies in cheap energy generation. Sun Catalytix is working on an advanced system that will use low-cost solar panels to produce hydrogen. This hydrogen will then be stored and used to produce electricity in a fuel cell. 11 Comments

IMEC (Interuniversity Microelectronics Center) has presented a large-area solar cell with 18.4% conversion efficiency at the ongoing European Photovoltaic Solar Energy Conference (Hamburg, Germany). A world leader in its own right, IMEC is an independent research center working on nanoelectronics and nanotechnology. It is headquartered in Leuven, Belgium, and has offices in Belgium, the Netherlands, Taiwan, US, China and Japan. 4 Comments

The Eindhoven University of Technology and University of Ulm scientists have successfully developed the first high-resolution 3D images of the internal structure of a hybrid polymer solar cell. This helps them in gaining important insights into the nanoscale structure of polymer solar cells and how much it will be effective when used for energy generation. They also gathered more information on the operational principles of polymer solar cells. Stefan Oosterhout, who is the leader of the team says that the images, prepared using 3D electron tomography, show how the nanoscale structure of the polymer solar cell influences its ability to produce electricity. 1 Comment

Silicon is one of the basic but expensive materials used in designing solar panels. If we can use something else as effective as silicon but more economical, solar power will be within the reach of the common consumers. Cornell researchers are thinking on somewhat similar lines. They are using a carbon nanotube instead of traditional silicon that hopefully will lead to much more efficient ways of converting light to electricity. 2 Comments

Sunlight is a non exhaustible source of energy without contributing greenhouse gases to the atmosphere. Still it is miles away from replacing the fossil fuels. Many reasons can be sited. One of its biggest disadvantages is it is still out of reach for the common man and it has a long break-even period. Unless a product or service is embraced by masses it can’t be treated as alternative source to fossil fuels. But scientists are tirelessly working on solar cells. It is believed that solar cells could soon be produced more cheaply using nanoparticle "inks". These nanoparticles can help in printing solar cells like newspaper or painted onto the sides of buildings or rooftops to absorb electricity-producing sunlight. 6 Comments

We all are familiar with the positive impact of alternative energy on our environment. Now researchers are trying to improve upon the existing alternative energy technology. As far as solar energy is concerned they are trying to make solar panels cheap and people friendly. Normally the solar panels are quite bulky and difficult to fit in on existing architecture. Therefore scientists all over the world are focusing on developing organic solar cells. They could be inexpensive and look like thin films. 5 Comments

Stirling Energy Systems (SES) and Tessera Solar worked jointly and have come out with their precious device called SunCatchers(TM). They exhibited their four newly designed solar power collection dishes at Sandia National Laboratories’ National Solar Thermal Test Facility (NSTTF). SunCatchers are the new dishes that will be utilized on commercial-scale by 2010. Chuck Andraka, who is the lead Sandia project engineer, shares his enthusiasm about SunCatchers, "The four new dishes are the next-generation models of the original SunCatcher system. Six first-generation SunCatchers built over the past several years at the NSTTF have been producing up to 150KW of grid-ready electrical power during the day. Every part of the new system has been upgraded to allow for a high rate of production and cost reduction." 7 Comments

When one lives in a developed country it becomes hard to visualize that how people manage in those parts of the world where electricity is still a distant dream. Residents of the village Ahire, Maharashtra in India claimed that people didn’t want to marry their daughters in their village due to lack of electricity. Now the government has installed solar panels in the village and the residents are having electricity for the first time. Similarly someone is thinking about people living in Sub-Saharan Africa, which is said to be the least electrified region in the world. To a rational mind the task seems daunting. The mind will think about infrastructure, finance, technical know-how, professionals etc. But an imaginative mind will think of bypassing all this and think about reality and what works without the essentials. A Kansas State University student is doing such kind of thinking. He is combining engineering and nature to design a more affordable and more sustainable lighting source for those souls living without electricity. 4 Comments

There are two things that prevent solar cells from entering the mainstream: their prohibitive cost, and their inadaptability. Even if people can somehow overcome the cost barrier, the havoc they allegedly wreck upon buildings and houses keeps many people away from switching to non-fossil-fuel power generation, and besides, sunshine is never uniform. It varies with location, it fluctuates with the movement of the sun, and it increases and decreases in intensity as the weather changes. To justify cost and effort, people need something more stable, more dependable, and more sustainable. 5 Comments

Just imagine your neighborhood mason fitting your roof tiles and these same tiles producing dependable solar energy for your house or office – you no longer need to hire scientists and alternative energy nerds for a simple roof job, and the cost is no longer a bottleneck. A technology catches on when it is easier to implement and efficient to use. With Solé tiles, constructing roofs that produce solar energy without becoming cumbersome and expensive eye-sores is soon going to become a reality. 13 Comments

Not even in our wildest dreams have we anticipated that while we are simply looking out the window enjoying the outside view our windows can simultaneously produce energy for our household needs! Not only windows but the facade of the house, too, might be harnessing the power of solar energy. This might be our future domestic power supply scenario. This can be possible with the help of transparent solar cells. These solar cells can increase the surface area to produce energy. 6 Comments

Researchers at Pacific Northwest National Laboratory (PNNL) in Richland have developed flexible solar panels that could be installed on roofs like shingles. This technology was originally used to protect flat panel televisions from dampness. They used to cover television screen with transparent, thin films that acted as barriers. These transparent thin film barriers are now becoming the basis for flexible solar panels that would be installed on roofs like shingles. These flexible rooftop solar panels are known as building-integrated photovoltaics, or BIPVs. They could replace today's boxy solar panels. We all know that current solar panels are made with rigid glass or silicon and mounted on thick metal frames. If we compare present solar panels and flexible solar shingles we will find the later ones less expensive to install than current panels and made to last 25 years. 18 Comments

For centuries we have been using fossil fuels for industrial and domestic purposes. Most of us consider fossil fuels cheap. But now we are realizing the "real" costs of using fossil fuels. It is destroying our environment and making us pay in other terms. Another problem we are facing is, what were luxuries for the previous generation have become the necessities for current generation. We are using lots of gadgets such as computers, cell phones, iPhones and kitchen and home appliances. They all run on electricity. It is now clear that most of us will be driving electric cars in future. So the problem will be compounded by our growing energy needs. According to the newest forecast from the World Energy Council (WEC) global electricity requirements will double in the next 40 years. At the same time, we know that prices for the dwindling resources of petroleum and natural gas are mounting. 6 Comments

The alternative sources of energy are constantly evolving. Scientists and manufacturers are trying to come up with better products that are user friendly and economical. Government is drawing policies that encourage use of alternative sources of energy. Researchers, entrepreneurs and common people are devising their own ways to use clean and green sources of energy. We are reading almost everyday about some innovation in the area of alternative energy by one university or another. Recently, University of Lleida has designed a concentration solar power module that produces heat, cold and electricity. The unique feature of these solar power modules is that they can be integrated to façades or building roofs. People instrumental in this project are Daniel Chemisana who is a member of the research group in Agrometeorology and Energy for Environment, Manel Ibáñez and Joan Ignasi Rosell. Both Manel Ibáñez and Joan Ignasi Rosell are lecturers in University of Lleida. 5 Comments

Akira Fujishima, thirty-five years ago, discovered the electrochemical properties of titanium dioxide. He showed that titanium dioxide functioned as a photocatalyst. It produced hydrogen gas from water, electricity and sunlight. Scientists are quite hopeful regarding the qualities of Titania (or titanium dioxide). This is also known as white pigment. It’s used in many products be it paint, toothpastes or sunscreen lotions. Researchers have been exploring different ways to optimize the process started by Akira Fujishima. They want to develop a commercially viable technology that transforms cheap sunlight into hydrogen, a pollution-free fuel that can be stored and shipped. 4 Comments

Scientists are constantly working on alternative energy sources to make its use widespread like fossil fuels. They are tirelessly working on the drawbacks of alternative energy sources so that they can be all pervasive like traditional sources of energy. Engineers at Oregon State University have found out a method to use an ancient life form to create one of the newest technologies for solar energy. These life forms can be successfully incorporated into the solar devices. 3 Comments

A team of scientists at the Georgia Institute of Technology has developed a new treatment for silicon photovoltaic solar cells. This new method generates bumps and peaks on the surface that increase cell efficiency in two ways. The uneven surface protects the cells from water and dust. When water falls on the surface, it flows off taking away dust and dirt. This auto-cleaning mechanism will help the solar cells to absorb maximum sunlight most of the time. We all know that the three-dimensional structures manage to trap more light and reflect less. If the efforts of researchers of the Georgia Institute of Technology succeed, that will increase the light absorption, reduce reflection and keep cells neat and clean of dirt particles. 6 Comments

Now scientists are working on metallic nanoparticles to manipulate light in more effective ways than conventional optical materials to tap extra energy from the sunlight. Rice University researchers are paying attention to cup-shaped gold nanostructures that can bend light in a more manipulative manner. Here the cup behaves like three-dimensional nano-antennas. 4 Comments

Solar cells are usually made of silicon coated with a thin layer of silicon nitrate. This silicon nitrate works as an anti-reflective agent to boost cell efficiency. But the catch is these types of cells are costly to produce. This anti-reflective layer deposition happens in vacuum and creating vacuum like situation doesn’t come cheap! 6 Comments