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Siberian Primrose Has Not Had Time to Adapt to Climate Change

Global warming already affects Siberian primrose, a plant species that is threatened in Finland and Norway. 

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Air–Sea Coupling Improves the Simulation of the Western North Pacific Summer Monsoon in the WRF4 Model at a Synoptic Scale Resolving Resolution

Regional air–sea coupling plays a crucial role in modulating the climatology and variability of the Asian summer monsoon. 

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Grabbing Viruses Out of Thin Air

The future could hold portable and wearable sensors for detecting viruses and bacteria in the surrounding environment.

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Iron Infusion Proves Effective to Treat Anaemia in Rural Africa

Iron-deficiency anaemia is a major concern in low-income settings, especially for women. 

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Using a Soft Crystal to Visualize How Absorbed Carbon Dioxide Behaves in Liquid

A team of scientists has succeeded in visualizing how carbon dioxide (CO2) behaves in an ionic liquid that selectively absorbs CO2. 

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Guiding the Way to Improved Solar Cell Performance

Understanding how particles travel through a device is vital for improving the efficiency of solar cells. Researchers from KAUST, working with an international team of scientists, have now developed a set of design guidelines for enhancing the performance of molecular materials.

When a packet of light, or photon, is absorbed by a semiconductor, it generates a pair of particles known as an exciton. An electron is one part of this pair; the other is its positively charged equivalent, called a hole. Excitons are electrically neutral, so it is impossible to set them in motion by applying an electric field. Instead the excitons "hop" by a random motion or diffusion. The dissociation of the excitons into charges is necessary to create a current but is highly improbable in an organic semiconductor.

“So typically, we need to blend two semiconductors, a so-called electron donor and an electron acceptor, to efficiently generate free charges,” explains Yuliar Firdaus. “The donor and acceptor materials penetrate into one another; maximizing the exciton diffusion length— the distance the exciton can travel before recombining and being lost— is crucial for optimizing the organic solar cell’s performance.

Read more: King Abdullah University of Science & Technology

Bilayer solar cell based on the organic semiconductor copper(I) thiocyanate (CuSCN) provides a new platform for exciton diffusion studies. (Photo Credit: © 2020 KAUST)


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Novel Chemical Process a First Step to Making Nuclear Fuel with Fire

Developing safe and sustainable fuels for nuclear energy is an integral part of Los Alamos National Laboratory’s energy security mission.

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Thanksgiving Weekend Forecast: Rain and Snowfall for Many Parts of U.S.

NOAA National Weather Service forecasters are predicting rain and moderate snow in portions of the country as we head into the Thanksgiving holiday weekend.

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Sea Level Watcher Takes Flight

Sentinel-6 Michael Freilich will extend a nearly 30-year continuous dataset on sea surface height.

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Record-Breaking Atlantic Hurricane Season Draws to an End

Improved forecasts, extensive preparedness helped protect lives and property.

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