Photovoltaic

Photovoltaic solar cells convert light energy from the sun into electricity. Although significant strides have been made in increasing the efficiency of photovoltaic technology, they usually only result in incremental increases. Researchers at Stanford University have come up with a way that could more than double the efficiency of existing solar cell technology and potentially reduce the costs of solar energy production enough for it to compete with oil as an energy source. Instead of relying solely on photons, the new process, called “photon enhanced thermionic emission,” or PETE, simultaneously combines the light and heat of solar radiation to generate electricity. Read More

Imagine waking up on a cold winter’s morning to light streaming in through your bedroom window and the smell of fresh coffee. The concrete floor is warm and your favorite music starts to play as you eat your breakfast. As you drive away the house automatically locks, the thermostat reduces and the insulation panels close as the house goes into hibernation until you return. Welcome to LUMENHAUS, the completely solar powered, open plan house that uses computer technology, flexible architectural design and energy efficiency to adapt to its owner’s changing needs as well as environmental conditions... and it recently won the 2010 Solar Decathlon Europe. Read More

A couple of years ago, we told you about an eco-friendly resort in the U.S. that was planning on using solar-diesel hybrid houseboats designed by Solarsailor. The boats would feature large, moving photovoltaic “wings” that would not only track the sun to gather energy, but also serve as rigid sails – so the boats could move via solar, diesel or wind power. When docked, the boats’ panels would still gather solar energy, which they would feed into the resort’s power grid. The technology has now been implemented on a passenger ferry, the Suntech-Guosheng, that will take up to 180 sightseers on cruises of the Huangpu River as part of the Shanghai World Expo. Read More

Canada's Kiwi Choice has announced the release of a strangely familiar-looking portable solar charger for mobile devices. The three-panel photovoltaic fan design first used by Solio has found its way to Kiwi's U-Powered charger. Featuring a powerful battery, LED flashlight and magnetic feet, the product also comes with multiple device connector tips for maximum compatibility. Read More

California-based manufacturer of low-cost solar materials, Innovalight, has achieved record of 19 percent conversion efficiency for its silicon ink-based solar cells. Read More

While the idea of using photovoltaic technology in windows to harvest sunlight for conversion to energy is not new, Smart Energy Glass (SEG) is taking a slightly different approach with a solar window that can be darkened or lightened for comfort and convenience. Read More

Last month at the meeting of the Japan Society of Applied Physics, a research group from the Kyoto Institute of Technology introduced a new photovoltaic cell that is capable of generating electricity not only from visible light, but from ultraviolet and infrared light as well. The research group, led by associate professor Saki Sonoda, hopes that this will lead to a more efficient PV cell that can be single-junction rather than the more conventional multi-junction. Read More

In spite of the technological age we live in it is reported that one-in-five people on this planet still don’t have access to clean drinking water. To help correct this imbalance, a new, energy-efficient desalination plant with an expected production capacity of 30,000 cubic meters per day will be built in the city of Al Khafji, Saudi Arabia, to serve its 100,000 people. Known more for its computers, IBM has joined forces with KACST (King Abdulaziz City for Science and Technology) to build the plant that will be powered by ultra-high concentrator photovoltaic (UHCPV) technology - a system with a concentration greater than 1,500 suns. Read More

As regular readers will know, we cover more than our fair share of breakthroughs promising next-generation super-efficient solar cells. Everything from growing photovoltaic crystals, applying special coatings or using carbon nanotubes teases us with cheaper, more efficient solar energy - eventually. In this latest news, scientists are using current technology in a new type of concentrating array which they say is four times more efficient and three times cheaper than current solar cells. Read More