Archive for the ‘solar power’ category: Page 11

Mar 21, 2022

Cheap renewables could make green hydrogen a practical replacement for fossil fuels

Posted by in categories: solar power, sustainability

Hydrogen made using electricity generated from wind or solar power could provide a clean and carbon-neutral source of energy. Europe is leading the way.

Mar 20, 2022

Sonoma County Airport Launches Solar Power Systems

Posted by in categories: climatology, government, solar power, sustainability

The Charles M. Schulz Sonoma County Airport had two solar power systems installed onsite and made them live in February. Over the course of their electricity-generating life spans, they will offset thousands of tons of CO2 emissions and potentially save millions of dollars.

Sonoma County has been hit particularly hard by wildfires in the last several years. These natural disasters occur with some regularity on their own, but many believe the latest ones are connected to the effects of climate change. The county has been experiencing higher temperatures and droughts as well. As a result of these challenges, Sonoma County’s government set a goal for the county to be carbon neutral by 2030. The airport solar power installations fit within the carbon-free plan. (The California state government has a goal for California to be operating on clean, carbon-free electricity by 2045.)

Jon Stout, the Sonoma Airport Manager, and Rachel McLaughlin, ForeFront Power’s Vice President of Sales & Marketing, provided some insights to CleanTechnica about the new solar power systems. (The last three answers are from ForeFront.)

Mar 19, 2022

Record efficiency of 28.7% for perovskite-silicon tandem solar cell

Posted by in categories: solar power, sustainability

Q Cells has set a new world-record tandem cell efficiency of 28.7% in collaboration with researchers at Helmholtz-Zentrum Berlin using a Q.antum-based silicon bottom cell in combination with a perovskite-based top cell.

Mar 18, 2022

Scientists figured out a way to clean dust off of solar panels without using water

Posted by in categories: solar power, sustainability

Dust on solar panels reduces their output significantly, so they need to be kept clean. But how? Scientists say they have a solution.

Mar 18, 2022

T.Werk takes steel on a flat solar roof instead of aluminium

Posted by in category: solar power

The commercial roof segment is driving the market in photovoltaics. Since millions of euros are often at stake, the expectations in durability and quality are particularly high. May be steel is a better choice than aluminium.

Mar 17, 2022

Self-assembling and complex, nanoscale mesocrystals can be tuned for a variety of uses

Posted by in categories: biotech/medical, chemistry, nanotechnology, solar power

A research team from KTH Royal Institute of Technology and Max Planck Institute of Colloids and Interfaces reports to have found the key to controlled fabrication of cerium oxide mesocrystals. The research is a step forward in tuning nanomaterials that can serve a wide range of uses—including solar cells, fuel catalysts and even medicine.

Mesocrystals are nanoparticles with identical size, shape and crystallographic orientation, and they can be used as to create artificial nanostructures with customized optical, magnetic or electronic properties. In nature, these three-dimensional structures are found in coral, sea urchins and calcite desert rose, for example. Artificially-produced cerium oxide (CeO2) mesocrystals—or nanoceria—are well-known as catalysts, with antioxidant properties that could be useful in pharmaceutical development.

“To be able to fabricate CeO2 mesocrystals in a controlled way, one needs to understand the formation mechanism of these materials,” says Inna Soroka, a researcher in applied at KTH. She says the team used radiation chemistry to reveal for the first time the ceria mesocrystal formation mechanism.

Mar 17, 2022

An indium oxide-based transistor created using atomic layer deposition

Posted by in categories: computing, mobile phones, solar power, sustainability

Over the past decades, engineers have created increasingly advanced and highly performing integrated circuits (ICs). The rising performance of these circuits in turn increased the speed and efficiency of the technology we use every day, including computers, smartphones and other smart devices.

To continue to improve the performance of integrated circuits in the future, engineers will need to create thinner transistors with shorter channels. Down-scaling existing silicon-based devices or creating smaller devices using alternative semiconducting materials that are compatible with existing fabrication processes, however, has proved to be challenging.

Researchers at Purdue University have recently developed new transistors based on indium oxide, a semiconductor that is often used to create touch screens, flatscreen TVs and solar panels. These transistors, introduced in a paper published in Nature Electronics, were fabricated using atomic layer deposition, a process that is often employed by transistor and electronics manufacturers.

Mar 17, 2022

Materials scientists discover why perovskite solar cells degrade in sunlight

Posted by in categories: solar power, sustainability

Materials scientists at the UCLA Samueli School of Engineering and colleagues from five other universities around the world have discovered the major reason why perovskite solar cells—which show great promise for improved energy-conversion efficiency—degrade in sunlight, causing their performance to suffer over time. The team successfully demonstrated a simple manufacturing adjustment to fix the cause of the degradation, clearing the biggest hurdle toward the widespread adoption of the thin-film solar cell technology.

A detailing the findings was published today in Nature. The research is led by Yang Yang, a UCLA Samueli professor of materials science and engineering and holder of the Carol and Lawrence E. Tannas, Jr., Endowed Chair. The co-first authors are Shaun Tan and Tianyi Huang, both recent UCLA Samueli Ph.D. graduates whom Yang advised.

Perovskites are a group of materials that have the same atomic arrangement or crystal structure as the mineral calcium titanium oxide. A subgroup of perovskites, , are of great research interest because of their promising application for energy-efficient, .

Mar 16, 2022

Simple fix prevents perovskite solar cells from degradation in sunlight

Posted by in categories: solar power, sustainability

The fix could pave the way for commercialization of the high-performance, sunlight-to-electricity discovery.

Mar 14, 2022

Scientists fabricate novel electrical component to improve stability of solar cells

Posted by in categories: internet, nanotechnology, solar power, sustainability

In the future, decarbonized societies that use internet of things (IoT) devices will become commonplace. But to achieve this, we need to first realize highly efficient and stable sources of renewable energy. Solar cells are considered a promising option, but their electrical contacts suffer from a “tradeoff” relationship between surface passivation and conductivity. Recently, researchers from Japan have developed a new type of electrical contact that can overcome this problem.

The most recent type of commercial photovoltaic cell (solar cell) uses stacked layers of crystalline silicon (c-Si) and an ultrathin layer of silicon oxide (SiOx) to form an electrical contact. The SiOx is used as a “passivating” film—an unreactive layer that improves the performance, reliability, and stability of the device. But that does not mean that simply increasing the thickness of this passivating layer will lead to improved . SiOx is an electrical insulator and there is a trade-off relationship between passivation and the conductivity of the electrical contact in solar cells.

In a new study, published in ACS Applied Nano Materials, a research team led by Assistant Professor Kazuhiro Gotoh and Professor Noritaka Usami from Nagoya University has developed a novel SiOx layer that simultaneously allows high passivation and improved conductivity. Named NAnocrystalling Transport path in Ultrathin dielectrics for REinforcing passivating contact (NATURE contact), the new electrical contact consists of three-layer structures made up of a layer of silicon nanoparticles sandwiched between two layers of oxygen-rich SiOx. “You can think of a passivating film as a big wall with gates in it. In the NATURE contact, the big wall is the SiOx layer and the gates are Si nanocrystals,” explains Dr. Gotoh.

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