Energy & Green Tech

Device generates light from the cold night sky

An inexpensive thermoelectric device harnesses the cold of space without active heat input, generating electricity that powers an LED at night, researchers report September 12 in the journal Joule.

Electronics & Semiconductors

Passive radiative cooling can now be controlled electrically

Energy-efficient ways of cooling buildings and vehicles will be required in a changing climate. Researchers at Linköping University have now shown that electrical tuning of passive radiative cooling can be used to control ...

Engineering

Solar cell keeps working long after sun sets

About 750 million people in the world do not have access to electricity at night. Solar cells provide power during the day, but saving energy for later use requires substantial battery storage.

Engineering

New water vapor condenser takes cues from darkling beetle

Access to clean water is a huge issue across the globe. Even in areas with water resources, a lack of infrastructure or reliable energy means purifying that water is sometimes extremely difficult.

Energy & Green Tech

Thermoelectric technologies can help power a zero-carbon future

Thermometers are an under-appreciated marvel of human ingenuity built upon an understanding of relatively simple physical principles. Mercury and alcohol thermometers rely on the volume of liquids growing or shrinking in ...

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