Lifeboat Foundation

Photovoltaics will play a key role in the future energy supply. Conventional solar cells based, for instance, on silicon, a well-known semiconductor material, are already highly developed and in widespread use. However, their production is complex because it requires a high vacuum with high temperatures. It can take up to five years for the energy used for production to be offset by operation.

This is where solar cells based on organic semiconductors can make a difference, as they can be printed in an energy-and cost-saving way. However, there are limitations to the energy conversion that need to be examined in more detail. A research team led by the Professorship of Optics and Photonics of Condensed Matter at Chemnitz University of Technology has investigated which main factors are decisive for the power limitation of organic solar cells.

The lead author of the study is Christopher Wöpke, research associate at the Professorship of Optics and Photonics of Condensed Matter at Chemnitz University of Technology. He was joined in the study by scientists from the universities of Bayreuth, Bern (CH), Durham (UK), Erlangen-Nuremberg and the Advanced Light Source Berkeley Lab (U.S.). Among other things, the team found that transport resistance in particular severely limits the performance of organic solar cells.

The high-flying unmanned aerial vehicle has been above Arizona for more than a month, living on batteries, solar power and a prayer.

The Dubai facility has the capacity to produce over two million pounds of leafy greens annually, and will grow lettuces, arugula, mixed salad greens, and spinach.

ECO stands for Emirates Crop One; the vertical farm is a joint venture between Crop One Holdings (a Massachusetts-based vertical farming company) and Emirates Flight Catering (the catering business that serves Emirates Airlines). Greens from the vertical farm will be served onboard Emirates flights, and will also be sold in grocery stores in the UAE. Since they’re grown in a sterile environment without pesticides, herbicides, or chemicals, the greens come ready-to-eat and don’t need to be washed.

The UAE is in many ways an ideal location for vertical farming, if not a place where the technology may soon become essential. It gets an abundance of sunlight but doesn’t have much water to speak of (it was, fittingly, the field testing site for a nanoparticle technology that helps sandy soil retain water and nutrients); that means vertical farms could use energy from solar panels to grow food indoors using 95 percent less water than traditional agriculture.

Nestled in deep woods in Jefferson, Kim and Rusty Fenn live off the grid in a home they built themselves out of wood from their property. They have two solar-power systems on their roof, one to generate electricity and one to heat their water.

They have all the appliances any home would want, and the solar power provides all their needs. They heat with a heat pump and a wood stove.

Kim, the creative one of the couple, had a pile of chicken grain bags, and decided to make a bag out of one. She then made a bunch for Christmas presents for friends and family. They were such a hit, that the couple decided to make them commercially.

German energy firm RWE is to invest in a pilot project centered around the deployment of floating solar technology in the North Sea, as part of a wider collaboration focused on the development of “floating solar parks.”

Set to be installed in waters off Ostend, Belgium, the pilot, called Merganser, will have a capacity of 0.5 megawatt peak, or MWp. In a statement earlier this week, RWE said Merganser would be Dutch-Norwegian firm SolarDuck’s first offshore pilot.

RWE said Merganser would provide both itself and SolarDuck with “important first-hand experience in one of the most challenging offshore environments in the world.”

Silicon is one of the most abundant elements on Earth, and in its pure form the material has become the foundation of much of modern technology, from solar cells to computer chips. But silicon’s properties as a semiconductor are far from ideal.

For one thing, although silicon lets electrons whizz through its structure easily, it is much less accommodating to “holes”—electrons’ positively charged counterparts—and harnessing both is important for some kinds of chips. What’s more, silicon is not very good at conducting heat, which is why overheating issues and expensive cooling systems are common in computers.

Now, a team of researchers at MIT, the University of Houston, and other institutions has carried out experiments showing that a material known as cubic boron arsenide overcomes both of these limitations. It provides high mobility to both electrons and holes, and has excellent thermal conductivity. It is, the researchers say, the best semiconductor material ever found, and maybe the best possible one.

Circa 2012

At 2:12 PM local time today, the MS *Tûranor *entered Monaco’s Hercule Harbor, becoming the first ship to travel around the world using only solar power.

It’s the same harbor where the *Tûranor *set out from more than 19 months and 37,286 miles ago. Since then, the ship has made port in six continents, fended off pirates and broke four Guinness world records, including longest journey by solar powered boat and first circumnavigation by solar powered boat.

Continue reading “World’s First Circumnavigation By Solar Powered Ship a Success” »

Now, researchers at the Karlsruhe Institute of Technology (KIT) have developed a prototype for fully scalable all–perovskite tandem solar modules. They were able to scale up individual perovskite cells with a power conversion efficiency of up to 23.5% at an aperture area of 0.1 square centimeters to all-perovskite tandem solar modules with an efficiency of up to 19.1% with an aperture area of 12.25 square centimeters.

The aperture area is the usable part of the surface that is not covered by electrodes, frames, or fasteners. At approximately five percent, the loss of efficiency when upscaling is relatively low. “This is the first report of an all-perovskite tandem solar module worldwide,” says Dr. Bahram Abdollahi Nejand, lead author of the publication and team leader for all-perovskite tandem solar modules.

The KIT researchers claimed this remarkable result is the first of its kind reported worldwide. To obtain this, the team increased the efficiency by optimizing the light path and reducing reflections in the solar cell architecture. They implemented an efficient layout for tandem solar modules using high-throughput laser scribing that enables the production of functional tandem solar mini-modules with two-terminal interconnected cell strips. Lastly, they used coating processes (blade coating and vacuum deposition) that are already established in industrial practice.