Engineering

Researchers find solar photovoltaics benefits outweigh costs

Over the past decade, the cost of solar photovoltaic (PV) arrays has fallen rapidly. But at the same time, the value of PV power has declined in areas that have installed significant PV generating capacity. Operators of ...

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.

Energy & Green Tech

Solar cell material can recycle light to boost efficiency

Scientists have discovered that a highly promising group of materials known as hybrid lead halide perovskites can recycle light - a finding that they believe could lead to large gains in the efficiency of solar cells.

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