PhotoVoltaics

As the world continues its quest to use less fossil fuels, the latest possible solution comes from the most unlikely of sources: the tobacco plant. This latest news comes from the University of California, Berkley. It will be nice to see tobacco used for something other than lung cancer. This new discovery is based on the possibility of literally programming the cells of the plants to get solar cells from tobacco plants. The science behind it is actually pretty simple (at least in explanation form) and pretty amazing. By using a genetically engineered virus, scientists were able to literally transform the cells of the plants to create synthetic solar cells. No Comments

What can a scientist do with salad dressing apart from telling you that it increases the taste of salad manifold? But that’s the beauty of this profession. As Newton could give some theories when he saw an apple falling from a tree, salad dressing can inspire scientists towards a brand new type of solar cells. The researchers managed to create a cheap, efficient and very simple method of making solar cells. The USP of these solar cells is that they self-assemble on a variety of substrates. The new technique draws parallel from the fact that oil and water don’t mix at all. Another unique fact is forces the elements of electronic components for example solar cells assemble themselves at the boundaries between the two types of liquids. This work was recently published in Proceedings of the National Academy of Sciences (PNAS). 7 Comments

Tiny, glitter-sized solar cells have been developed by the Scientists at Sandia National Laboratories. It might turn out to be the perfect alternative energy preference for the holiday season. This project is funded by the American government. The dimensions of the snowflake sized crystalline-silicon photovoltaic cells are merely 14-20 micrometers thick and measure 0.25 to 1 millimeters across i.e. only 10% as thick as regular ones. They also consume an estimated 100 times less silicon to produce the same amount of electricity compared to standard solar cells. Their efficiency level is 14.9%. 6 Comments

Robins has time and again been considered as a pioneer in testing alternative energy technologies. Recently they have installed a solar panel which is a matter of curiosity. Their installed solar panel assumes the dimensions of a drive-in-movie screen. It is the shining example of the state-of-the-art technology. At peak hour it generates 25 kilowatts of electricity. 7 Comments

You can think of it as origami -- very high-tech origami. Researchers at the University of Illinois are working on the same good old silicon but they are taking an entirely different route. They are working on thin films of silicon applying two processes one is photolithography and another is self-folding process driven by capillary interactions. This technique results in the three-dimensional, single-crystalline silicon structures. Their films are only a few microns thick. Their greatest strength is mechanical bendability that is not possible with thicker pieces of the same material. 2 Comments

When we think about going solar we make a mental picture of large heavy panels adorning one’s rooftop. But researchers are trying to get rid of bulky solar panels. They are aiming to achieve this feat with the help of zinc oxide nanostructures grown on optical fibers and coated with dye-sensitized solar cell materials. Researchers at the Georgia Institute of Technology have built up a new kind of three-dimensional photovoltaic system. This three-dimensional photovoltaic system will not be heavy and it will not occupy a place of prominence on rooftops; it can be hidden from the view. No Comments

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. 17 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. 5 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. 14 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. 20 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