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Perovskite solar cells (PSCs) can offer high light-conversion efficiency with low manufacturing costs. But to be commercially viable, perovskite films must also be durable and not degrade under solar light over time. EPFL scientists have now greatly improved the operational stability of PSCs, retaining more than 95% of their initial efficiencies of over 20 % under full sunlight illumination at 60^oC for more than 1000 hours. The breakthrough, which marks the highest stability for perovskite solar cells, is published in Science.

Challenges of stability

Conventional silicon solar cells have reached a point of maturation, with efficiencies plateauing around 25% and problems of high-cost manufacturing, heavyweight, and rigidity has remained largely unresolved. On the contrary, a relatively new photovoltaic technology based on perovskite solar cells has already achieved more than 22% efficiency.

Continue reading “Perovskite solar cells reach record long-term stability, efficiency over 20 percent” »

Singapore gets its first electric vehicle-sharing service, and it comes from France.

It’s not every day scientists say a new kind of renewable energy could satisfy the majority of our power needs, so when they do, it’s worth leaning in close.

In a first-of-its-kind study, researchers have found that energy harvested from the evaporation of water in US lakes and reservoirs could power nearly 70 percent of the nation’s electricity demands, generating a whopping 325 gigawatts of electricity.

Alongside the great strides being made in solar and wind, biophysicist Ozgur Sahin from Columbia University says natural evaporation represents a massive unexplored resource of environmentally clean power generation, just waiting to be tapped.

Continue reading “Evaporating Water Could Power Almost 70% of The US Electrical Grid” »

Dyson says the car will be unveiled in 2020 and will be ‘radically different’ to other vehicles on the market.

No human stepped foot on the acre and a half barley farm. The manual labor in Hands Free Hectare was done entirely by robot farmers.

James Dyson announced Tuesday he was investing £2.0 billion ($2.7 billion, 2.3 billion euro) into developing an electric car by 2020, a new venture for the British inventor of the bagless vacuum cleaner.

The 70-year-old British entrepreneur said work began two and a half years ago on a project which he hopes will help tackle the scourge of air pollution.

“Dyson has begun work on a battery electric vehicle, due to be launched by 2020,” he said in an email to employees, referring to his eponymous company.

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It may seem counterintuitive, but we can use a particle accelerator to make solar panels. Here’s how.